David
Psalm 135:12ESV·traditional attribution

and gave their land as a heritage, a heritage to his people Israel.

John Calvin Reformed @genevareformer

Psalm 135 An exhortation to praise God, both for his goodness specially shown to his chosen people, and for his power and glory apparent in the world at large. A contrast is drawn between idols, which had but a vain show of divinity, and the God of Israel, who had established his claim to be considered the only true God by clear and indubitable proofs...

Commenting on Psalm 135:1-21

C.H. Spurgeon Reformed Baptist @princeofpreachers

And gave their land for an heritage, an heritage unto Israel his people. Jehovah is Lord Paramount, and permits men to hold their lands upon lease, terminable at his pleasure. The nations of Canaan had become loathsome with abominable vices, and they were condemned by the great Judge of all the earth to be cut off from the face of the country which they defiled.

Matthew Henry Presbyterian @wholebiblehenry

The psalmist had suggested to us the goodness of God, as the proper matter of our cheerful praises; here he suggests to us the greatness of God as the proper matter of our awful praises; and on this he is most copious, because this we are less forward to consider. I.

Commenting on Psalm 135:5-14