Moses
Deuteronomy 5:10ESV·traditional attribution

but showing steadfast love to thousands of those who love me and keep my commandments.

Matthew Henry Presbyterian @wholebiblehenry

Here is the repetition of the ten commandments, in which observe, 1. Though they had been spoken before, and written, yet they are again rehearsed; for precept must be upon precept, and line upon line, and all little enough to keep the word of God in our minds and to preserve and renew the impressions of it. We have need to have the same things often inculcated upon us.

Commenting on Deuteronomy 5:6-22

Geneva Bible Notes Reformed @genevanotes

And shewing mercy unto thousands of them that love me and keep my commandments. (e) The first degree to keep the commandments, is to love God.

Keil & Delitzsch Lutheran @keilanddelitzsch

Deu 5:6-23 In vv. 6-21, the ten covenant words are repeated from Ex 20, with only a few variations, which have already been discussed in connection with the exposition of the decalogue at Exo 20:1-14. - In Deu 5:22-33, Moses expounds still further the short account in Exo 20:18-21, viz., that after the people had heard the ten covenant words, in their alarm at the...

Commenting on Deuteronomy 5:6-23