Exodus 24:4

24:4 and Moses wrote down all the words of the Lord. Early in the morning he built an altar at the foot of the mountain and arranged twelve standing stones – according to the twelve tribes of Israel.

Hebrews 9:18-23

9:18 So even the first covenant was inaugurated with blood. 9:19 For when Moses had spoken every command to all the people according to the law, he took the blood of calves and goats with water and scarlet wool and hyssop and sprinkled both the book itself and all the people, 9:20 and said, “This is the blood of the covenant that God has commanded you to keep.” 9:21 And both the tabernacle and all the utensils of worship he likewise sprinkled with blood. 9:22 Indeed according to the law almost everything was purified with blood, and without the shedding of blood there is no forgiveness. 9:23 So it was necessary for the sketches of the things in heaven to be purified with these sacrifices, but the heavenly things themselves required better sacrifices than these.