Numbers 7:7

7:7 He gave two carts and four oxen to the Gershonites, as their service required;

Numbers 6:10

6:10 On the eighth day he is to bring two turtledoves or two young pigeons to the priest, to the entrance to the tent of meeting.

Numbers 10:2

10:2 “Make two trumpets of silver; you are to make them from a single hammered piece. You will use them for assembling the community and for directing the traveling of the camps.