blood
Exodus 12:8,15 And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it...
Exodus 34:25 You shall not offer the blood of my sacrifice with leaven...
Leviticus 2:11 No meat offering, which you shall bring to the LORD, shall be made with leaven: for you shall burn no leaven, nor any honey...
Leviticus 7:12 If he offer it for a thanksgiving, then he shall offer with the sacrifice of thanksgiving unleavened cakes mingled with oil...
Deuteronomy 16:4 And there shall be no leavened bread seen with you in all your coast seven days; neither shall there any thing of the flesh...
* sacrifice. or feast. remain
Exodus 12:10 And you shall let nothing of it remain until the morning; and that which remains of it until the morning you shall burn with fire.
Leviticus 7:15 And the flesh of the sacrifice of his peace offerings for thanksgiving shall be eaten the same day that it is offered...