Moses
Leviticus 19:27BSB·traditional attribution

You must not cut off the hair at the sides of your head or clip off the edges of your beard.

John Calvin Reformed @genevareformer

27. Ye shall not round the corners. It clearly appears that God had no other object than by the interposition of this obstacle to sever His people from heathen nations. For there is nothing to which men are more prone than to conform themselves to the customs of others; and hence it arises, that they mutually communicate each other’s vices.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A law against mixtures, Lev 19:19. God in the beginning made the cattle after their kind (Gen 1:25), and we must acquiesce in the order of nature God hath established, believing that is best and sufficient, and not covet monsters.

Commenting on Leviticus 19:19-29

John Gill Reformed Baptist @doctorgill

Ye shall not round the corners of your heads,.... The extremities of the hairs of the head, round about, on the forehead, temples, and behind the ears; this is done, as Jarchi says, when any one makes his temples, behind his ears, and his forehead alike, so that the circumference of his head is found to be round all about, as if they had been...