Numbers 9:4-6

New International Version

⁴ So Moses told the Israelites to celebrate the Passover,^{(A) 5} and they did so in the Desert of Sinai^(B) at twilight on the fourteenth day of the first month.^(C) The Israelites did everything just as the Lord commanded Moses.^(D)

⁶ But some of them could not celebrate the Passover on that day because they were ceremonially unclean^(E) on account of a dead body.^(F) So they came to Moses and Aaron^(G) that same day