Exodus 34:24-25

24I will force nations out of your way and will expand ⌞your country’s⌟ borders. No one will want to take away your land while you’re gone three times a year to the Lord’s festivals.

25“Never offer the blood of a sacrifice to me at the same time you offer anything containing yeast. No part of the sacrifice at the Passover Festival should be left over in the morning.