Moses
Deuteronomy 19:2BSB·traditional attribution

then you are to set apart for yourselves three cities within the land that the LORD your God is giving you to possess.

Matthew Henry Presbyterian @wholebiblehenry

It was one of the precepts given to the sons of Noah that whoso sheddeth man's blood by man shall his blood be shed, that is, by the avenger of blood, Gen 9:6. Now here we have the law settled between blood and blood, between the blood of the murdered and the blood of the murderer, and effectual provision made, I.

Commenting on Deuteronomy 19:1-13

John Gill Reformed Baptist @doctorgill

Thou shalt separate three cities for thee in the midst of thy land,.... From the cities they took possession of and dwelt in; and indeed from the cities of the Levites, which were given to them to inhabit; three were before ordered to be separated from those inhabited by the tribes of Reuben and Gad, and the half tribe of Manasseh, Deu 4:41 but these...

Geneva Bible Notes Reformed @genevanotes

When a prophet speaketh in the name of the LORD, if the thing follow not, nor come to pass, that [is] the thing which the LORD hath not spoken, [but] the prophet hath spoken it presumptuously: thou shalt not be afraid of him. (k) Under this sure note he comprises all the other tokens.

Commenting on Deuteronomy 19:1-2