John Lightfoot on John 4:20

[Worshipped in this mountain.] The story of that Temple on Gerizim, out of Josephus and others, is very well known. It was built in emulation and envy to that at Jerusalem, as of old were Dan and Bethel. Hence that irreconcilable hatred between the two nations, and the apostasy of divers Jews. The Samaritans attributed a certain holiness to the mountain, even after the Temple had been destroyed; but for what reason, they themselves could not well tell. However, for the defence of it, the Samaritan text hath notoriously falsified the words of Moses in Deuteronomy 27:4: for whereas the Hebrew hath it, "Ye shall set up these stones, which I command you this day, in mount Ebal"; the Samaritan text and version hath it in mount Gerizim; as I have elsewhere observed.

"R. Jochanan going to Jerusalem to pray, he passed by that mountain [Gerizim]. A certain Samaritan seeing him, asked him, 'Whither goest thou?' 'I am,' saith he, 'going to Jerusalem to pray.' To whom the Samaritan, 'Were it not better for thee to pray in this holy mountain, than in that cursed house?' 'Whence comes this mountain to be so holy?' saith he: 'Because (saith the other) it was not overflown by the waters of the deluge.'" A doughty reason indeed!

"R. Ismael, the son of R. Joseph, going to Jerusalem to pray, passed by that mountain. A certain Samaritan meeting him, asks, 'Where art thou going?' 'I am going,' saith he, 'to Jerusalem, to pray.' Saith the other, 'Were it not better for thee to pray in this blessed mountain, than in that cursed place?' Saith the R., 'I will tell you what you are like; you are like a dog greedy after carrion: so you when you know that idols are hid under this mountain, as it is said, And Jacob hid them, you are acted with a greedy desire after them.' They said amongst themselves, 'Seeing he knows there are idols hidden in this mountain, he will come in the night and steal them away.' And they consulted together to have killed him, but he, getting up in the night, stole away."

Somewhat akin to this Temple on Gerizim was that built by Onias in Egypt, the story of which you have in Josephus, and the description of it. Of this Temple also the Gemarists discourse, from whom we will borrow a few things.

"Simeon the just dying, said, 'Onias my son shall minister in my stead.' For this, his brother Shimei, being older than he by two years and a half, grew very envious. He saith to his brother, 'Come hither, and I will teach thee the rule and way of ministering.' So he puts him on a leathern garment and girds him, and then setting him by the altar, cries out to his brethren the priests, 'See here what this man hath vowed, and does accordingly perform to his wife, viz., that whenever he ministered in the high priesthood, he would put on her stomacher [pectorale], and be girt about with her girdle.'" The Gloss upon the place saith the leathern garment, but Aruch, from Avodah Zarah, saith the stomacher of the heart. What the word in this place should mean is plain enough from the story itself. Shimei, that he might render his brother both ridiculous and odious to the rest of the priests, persuades him to perform his services with his wife's stomacher, instead of the breastplate of the high priest, and her girdle, instead of that curious one they were wont to be girt with, &c.

The story goes on: "His brethren the priests, upon this, contrive his death; but he, escaping their hands, fled into Alexandria of Egypt; and there building an altar, offered idolatrous sacrifices upon it. These are the words of Meir: but R. Judah tells him the thing was not so: for Onias did not own his brother Shimei to be two years and a half older than himself; but envying him, told him, 'Come, and I will teach thee the rule and method of thy ministry.'" And so, as R. Judah relates the matter, the tables are turned, the whole scene altered; so that Onias persuades his brother Shimei to put on his wife's stomacher, and gird himself with her girdle; and for that reason the priests do plot the death of Shimei. "But when he had declared the whole matter as it was indeed, then they designed to kill Onias. He therefore flying into Alexandria in Egypt, builds there an altar, and offered sacrifices upon it to the name of the Lord, according as it is said, In that day shall there be an altar to the Lord in the midst of the land of Egypt."

And now it is at the reader's choice to determine which of these two Temples, that in Egypt, or this upon Gerizim, is built upon the best foundation; the one, by a fugitive priest, under pretence of a divine prophecy; the other, by a fugitive priest too, under pretence that that mount was the mount upon which the blessings had been pronounced. Let the Jews speak for themselves, whether they believed that Onias, with pure regard to that prophecy, did build his Temple in Egypt; and let every wise man laugh at those that do thus persuade themselves. However, this is certain, they had universally much more favourable thoughts of that in Egypt than of this upon mount Gerizim. Hence that passage in the place before quoted: "If any one say, 'I devote a whole burnt offering,' let him offer it in the Temple at Jerusalem; for if he offer it in the Temple of Onias, he doth not perform his vow. But if any one say, 'I devote a whole burnt offering for the Temple of Onias, though he ought to offer it in the Temple at Jerusalem, yet if he offer it in the Temple of Onias, he acquits himself.' R. Simeon saith, It is no burnt offering. Moreover, if any one shall say, 'I vow myself to be a Nazarite,' let him shave himself in the Temple at Jerusalem; for if he be shaven in the Temple of Onias, he doth not perform his vow. But if he should say, 'I vow myself a Nazarite, so that I may be shaven in the Temple of Onias,' and he do shave himself there, he is a Nazarite."

[And ye say, that in Jerusalem, &c.] What! did not the Samaritans themselves confess that Jerusalem was the place appointed by God himself for his worship? No doubt they could not be ignorant of the Temple which Solomon had built; nor did they believe but that from the times of David and Solomon God had fixed his name and residence at Jerusalem. And as to their preferring their Temple on Gerizim before that in Jerusalem notwithstanding all this, it is probable their boldness and emulation might take its rise from hence, viz., they saw the second Temple falling so short of its ancient and primitive glory; they observed that the divine presence over the ark, the ark itself, the cherubims, the Urim and Thummim, the spirit of prophecy, &c., were no more in that place.