For one, its a literal commandment to only pray to god because Christ is the ONLY moderater.
1 Timothy 2:5
For there is one God, and one mediator between God and men, the man Christ Jesus;
John 14:6
6 Jesus saith unto him, I am the away, the btruth, and the life: no man ccometh unto the Father, but by me.
Heb. 8: 6
But now hath he obtained a more excellent ministry, by how much also he is the amediator of a better bcovenant, which was established upon better cpromises.
Heb. 9: 15
And for this cause he is the amediator of the bnew ctestament, that by means of ddeath, for the redemption of the etransgressions that were under the first ftestament, they which are called might receive the gpromise of eternal hinheritance.
Heb 12:24
24 And to Jesus the amediator of the bnew ccovenant, and to the dblood of sprinkling, that speaketh ebetter things than that of Abel.
Here are some of the scriptures that teach Christ is the only moderator. I’ll look for the commandment.