Matthew Poole and continuators on John 4:40

40 So when the Samaritans were come unto him, they besought him that he would tarry with them . And he abode there two days .

The Sichemites being come to Christ, had some Discourse with him, as appeareth from v. 41, 42. What the subject-matter of their Discourse was, we are not told; we may know that it was Spiritual, and something proper to excite Faith in them; for believing was the effect of it; they desire that he would abide with them: thus their Faith wrought by Love

Our Saviour, that he might not discourage the beginning of their Faith, did stay with them two days: For altho when he sent out his Disciples, he commanded them not to go into the way of the Samaritans, yet himself was not obliged by that Law, and did sometimes by Preaching to Heathens, and Converting of them, give an Earnest of the Calling of the Gentiles, whose fuller Calling was reserved to after times, yet probably, the reason why he would not stay longer with them than two days, was because the time was not yet come, for the fuller Calling of the Gentiles, and he was not willing by a longer abode with them to give offence to the Iews, betwixt whom and the Samaritans was a rooted Hatred upon the account of their differing Religion.