C. F. Keil and Franz Delitzsch on Exodus 34:17-26

Exo 34:17-26

The true way to worship Jehovah is then pointed out, first of all negatively, in the prohibition against making molten images, with an allusion to the worship of the golden calf, as evinced by the use of the expression מסּכה אלהי, which only occurs again in Lev 19:4, instead of the phrase “gods of silver and gold” (Exo 20:23); and then positively, by a command to observe the feast of Mazzoth and the consecration of the first-born connected with the Passover (see at Exo 13:2, Exo 13:11, and Exo 13:12), also the Sabbath (Exo 34:21), the feasts of Weeks and Ingathering, the appearance of the male members of the nation three times a year before the Lord (Exo 34:22, see at Exo 23:14-17), together with all the other instructions connected with them (Exo 34:25, Exo 34:26). Before the last, however, the promise is introduced, that after the expulsion of the Canaanites, Jehovah would enlarge the borders of Israel (cf. Exo 23:31), and make their land so secure, that when they went up to the Lord three times in the year, no one should desire their land, sc., because of the universal dread of the might of their God (Exo 23:27).