Moses
Leviticus 11:44ESV·traditional attribution

For I am the LORD your God. Consecrate yourselves therefore, and be holy, for I am holy. You shall not defile yourselves with any swarming thing that crawls on the ground.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The exposition of this law, or a key to let us into the meaning of it. It was not intended merely for a bill of fare, or as the directions of a physician about their diet, but God would hereby teach them to sanctify themselves and to be holy, Lev 11:44. That is, 1.

Commenting on Leviticus 11:43-47

John Gill Reformed Baptist @doctorgill

For I am the Lord your God,.... Their Lord, and therefore had a right to enjoin them what laws he pleased concerning their food; and their God, their covenant God, and therefore would consult their good, and direct them to what was most proper, convenient, and wholesome for them: ye shall therefore sanctify yourselves, and ye shall be holy, for I am holy; that is...

Geneva Bible Notes Reformed @genevanotes

For I [am] the LORD your God: ye shall therefore sanctify yourselves, and ye shall be holy; for I [am] holy: neither shall ye defile yourselves with any manner of creeping thing that creepeth upon the earth. (m) He shows why God chose them to be his people, .