Exodus 25:12-16

25:12 You are to cast four gold rings for it and put them on its four feet, with two rings on one side and two rings on the other side. 25:13 You are to make poles of acacia wood, overlay them with gold, 25:14 and put the poles into the rings at the sides of the ark in order to carry the ark with them. 25:15 The poles must remain in the rings of the ark; they must not be removed from it. 25:16 You are to put into the ark the testimony ¹  that I will give to you.

[25:16]  ¹ sn The “testimony” is the Decalogue (Exod 24:12; 31:18; Deut 4:13; 9:9; 1 Kgs 8:9); the word identifies it as the witness or affirmation of God’s commandments belonging to his covenant with Israel. It expressed God’s will and man’s duty. In other cultures important documents were put at the feet of the gods in the temples.