the Ten Commandments: Written by God
Source: TTT
Exodus 32:16
The tablets were the work of God, and the writing was the writing of God, engraved on the tablets.
Exodus 34:1, 28
Then the LORD said to Moses, “Chisel out two stone tablets like the originals, and I will write on them the words that were on the first tablets, which you broke. / So Moses was there with the LORD forty days and forty nights without eating bread or drinking water. He wrote on the tablets the words of the covenant—the Ten Commandments.
Deuteronomy 4:13
He declared to you His covenant, which He commanded you to follow—the Ten Commandments that He wrote on two tablets of stone.
Deuteronomy 10:4
And the LORD wrote on the tablets what had been written previously, the Ten Commandments that He had spoken to you on the mountain out of the fire on the day of the assembly. The LORD gave them to me,