Moses
Numbers 34:13ESV·traditional attribution

Moses commanded the people of Israel, saying, “This is the land that you shall inherit by lot, which the LORD has commanded to give to the nine tribes and to the half-tribe.

John Calvin Reformed @genevareformer

13. And Moses commanded the children of Israel. Though this is a repetition, yet it is not a superfluous one; for he contrasts the new allotment of the nine tribes and a half with the former grant; “La donation qui avoit este desia faite de la region de Basan;” the grant which had been already made of the district of Bashan. — Fr.

John Gill Reformed Baptist @doctorgill

And Moses commanded the children of Israel, saying,.... Strictly enjoining them to observe what he was about to say to them: this is the land which ye shall inherit by lot; as above described and bounded: which the Lord commanded to give unto the nine tribes, and to the half tribe; to the tribes of Judah, Simeon, Benjamin, Dan, Ephraim, Zebulun, Issachar, Asher, and Naphtali...

Jamieson-Fausset-Brown Reformed @jfbcommentary

The two tribes and the half-tribe have received their inheritance on this side Jordan--The conquered territories of Sihon and Og, lying between the Arnon and mount Hermon, were allotted to them--that of Reuben in the most southerly part, Gad north of it, and the half Manasseh in the northernmost portion.