The Ten Commandments are all reiterated in the New Testament, page-34

"Where is Jesus Christ mentioned in the OT?"

Deu 18:18 - I will raise up for them a Prophet like you from among their brethren, and will put My words in His mouth, and He shall speak to them all that I command Him.
John 1:45 - Philip found Nathanael and said to him, “We have found Him of whom Moses in the law, and also the prophets, wrote—Jesus of Nazareth, the son of Joseph.”

John 12:49 -For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak.
John 17:8 - For I have given to them the words which You have given Me; and they have received them, and have known surely that I came forth from You; and they have believed that You sent Me.