Adam Clarke's Commentary on the Bible - Exodus 12:17
Self-same day - בעצם beetsem , in the body of this day, or in the strength of this day; probably they began their march about day-break, called here the body or strength of the day, and in Deuteronomy 16:1 , by night - sometime before the sun rose. read more
Adam Clarke's Commentary on the Bible - Exodus 12:16
In the first day and in the seventh day there shall be a holy convocation - This is the first place where we meet with the account of an assembly collected for the mere purpose of religious worship. Such assemblies are called holy convocations, which is a very appropriate appellation for a religious assembly; they were called together by the express command of God, and were to be employed in a work of holiness. מקרא mikra , convocation, is a word of similar import with the Greek ... read more