Exodus 23:18

Overview - Exodus 23
Of slander, false witness, and partiality.
Of charitableness.
Of justice in judgment.
Of taking bribes.
Of oppressing a stranger.
10 Of the year of rest.
12 Of the sabbath.
13 Of idolatry.
14 Of the three feasts.
18 Of the blood and the fat of the sacrifice.
20 An angel is promised, with a blessing, if they obey him.
Treasury of Scripture Knowledge

Exodus 23:18  (King James Version)
Thou shalt not offer the blood of my sacrifice with leavened bread; neither shall the fat of my sacrifice remain until the morning.

Exodus 12:8 Exodus 12:15 34:25 Leviticus 2:11 ; 7:12 Deuteronomy 16:4

or, feast. remain.
12:10 Leviticus 7:15