Numbers 11:24

And Moses went out, and told the people the words of the Lord, and gathered the seventy men of the elders of the people, and set them round about the tabernacle.

Cross-reference

Numbers 11:16 commands the gathering of seventy elders; verse 24 reports Moses carrying out that command.

Numbers 11:26 adds that Eldad and Medad stayed in camp yet received the Spirit, continuing the story from verse 24.

Luke 10:1 has Jesus appoint seventy disciples, typologically echoing the seventy elders chosen in Numbers.

Exodus 24:1 also summons seventy elders to meet God, a parallel pattern of leadership gathering.