Bilangan 9:5

9:5 And they observed the Passover ¹  on the fourteenth day of the first month at twilight in the wilderness of Sinai; in accordance with all that the Lord had commanded Moses, so the Israelites did.

Bilangan 9:7

9:7 And those men said to him, “We are ceremonially defiled by the dead body of a man; why are we kept back from offering the Lord’s offering at its appointed time among the Israelites?”

[9:5]  ¹ tc The LXX omits this first clause; it also omits “at twilight.”