Numbers 7:12

The Tribal Offerings

7:12 The one who presented his offering on the first day was Nahshon son of Amminadab, from the tribe of Judah.

Numbers 15:21

15:21 You must give to the Lord some of the first of your finely ground flour as a raised offering in your future generations.

Numbers 28:18

28:18 And on the first day there is to be a holy assembly; you must do no ordinary work on it.