Leviticus 23:5-6

23:5 In the first month, on the fourteenth day of the month, at twilight, is a Passover offering to the Lord. 23:6 Then on the fifteenth day of the same month will be the festival of unleavened bread to the Lord; seven days you must eat unleavened bread.

Leviticus 24:5

24:5 “You must take choice wheat flour and bake twelve loaves; there must be two tenths of an ephah of flour in each loaf,