Exodus 23:15

“Thou shalt keep the feast of unleavened bread, etc.] Which began on the fourteenth of the month Abib or Nisan, and lasted seven days, during which time no leavened bread was to be eaten by the Israelites, or to be in their houses, of which see the notes on: (See Gill on “<021218>Exodus 12:15, 18-19”) (See Gill on “<021306>Exodus 13:6-7”) thou shall eat unleavened bread, seven days, as I commanded thee, in the time appointed of the month Abib; from the fourteenth of the month to the twenty first: for in it thou camest out of Egypt; in such haste that there was no time to leaven the dough in the troughs; in commemoration of which this law was given, and this feast was kept: and none shall…”

“This is the first mention of the three great Yearly Festivals. The feast of Unleavened bread, in its connection with the Paschal Lamb, is spoken of in Exodus 12:0; Exodus 13:0: but the two others are here first named. The whole three are spoken of as if they were familiarly known to the people. The points that are especially enjoined are that every male Israelite should attend them at the sanctuary (compare Exodus 34:23), and that he should take with him an offering for Yahweh, presenting himself before his King with his tribute in his hand. That this condition belonged to all the feasts, though it is here stated only in regard to the Passover, cannot be doubted. See Deuteronomy 16:16.…”

“23:15 appointed time in early spring, in the month of Abib: See 13:4-5; Lev 23:5-8; Deut 16:1-8.”

“the feast: Exo 12:14-28, Exo 12:43-49, Exo 13:6, Exo 13:7, Exo 34:18; Lev 23:5-8; Num 9:2-14, Num 28:16-25; Deu 16:1-8; Jos 5:10, Jos 5:11; Kg2 23:21-23; Mar 14:12; Luk 22:7; Co1 5:7, Co1 5:8 and none: Exo 34:20; Lev 23:10; Deu 16:16; Pro 3:9, Pro 3:10 Exodus 23:16”