Exodus 25:16

16 aAnd you shall put into the ark the btestimony that I shall give you.

Deuteronomy 10:3-5

3So I made an ark cof acacia wood, and dcut two tablets of stone like the first, and went up the mountain with the two tablets in my hand. 4And ehe wrote on the tablets, in the same writing as before, the Ten Commandments
Hebrew words
gthat the Lord had spoken to you on the mountain out of the midst of the fire hon the day of the assembly. And the Lord gave them to me.
5Then I turned and icame down from the mountain and jput the tablets in the ark that I had made. kAnd there they are, as the Lord commanded me.”

Copyright information for ESV