Exodus 24:6

24:6 Moses took half of the blood and put it in bowls, and half of the blood he splashed on the altar. ¹ 

Exodus 37:1

The Making of the Ark

37:1 Bezalel made the ark of acacia wood; its length was three feet nine inches, its width two feet three inches, and its height two feet three inches.

¹ sn The people and Yahweh through this will be united by blood, for half was spattered on the altar and the other half spattered on/toward the people (v. 8).