John Gills Exposition of the Bible Commentary - Exodus 34:25
Thou shall not offer the blood of my sacrifice with leaven ,.... That is, not kill the passover, while there was any leaven in their houses; so the Targum of Jonathan; see Gill on Exodus 23:18 . neither shall the sacrifice of the feast of passover be left unto the morning ; neither any of the flesh, nor of the fat of the passover lamb: if any were left, it was to be burnt, see Exodus 12:10 . read more
Matthew Henry's Complete Commentary - Exodus 34:18-27
Here is a repetition of several appointments made before, especially relating to their solemn feasts. When they had made the calf, they proclaimed a feast in honour of it; now, that they might never do so again, they are here charged with the observance of the feasts which God had instituted. Note, Men need not be drawn from their religion by the temptation of mirth, for we serve a Master that has abundantly provided for the joy of his servants: serious godliness is a continual feast, and joy... read more