Exodus 25:16
16 gAnd you shall put into the ark the htestimony that I shall give you.
Exodus 25:21
21 And you shall put the mercy seat on the top of the ark, and in the ark you shall put the testimony that I shall give you.
Exodus 31:18
18 And he gave to Moses, when he had finished speaking with him on Mount Sinai, the ttwo tablets of the testimony, tablets of stone, written with uthe finger of God.