How many elders did God tell Moses to gather to help him bear the burden of the people?

Answer: Seventy

God told Moses to bring seventy elders; He would put the Spirit on them so they could share the burden of the people.

“Then the LORD said to Moses, “Bring Me seventy of the elders of Israel known to you as leaders and officers of the people. Bring them to the Tent of Meeting and have them stand there with you.”— Numbers 11:16 (BSB)