For the Lord hath chosen Jacob unto himself - The descendants of Jacob. He has selected them from among all the inhabitants of the earth to be his special people.

And Israel for his peculiar treasure - The word here rendered treasure, means that which is acquired; property; wealth. They were what God possessed, owned, or claimed among all the people of the earth as especially his own. He had chosen them; he had redeemed them; he had made them his own, and he regarded them with the interest with which anyone looks on his own property, the fruit of his own toil. See Exodus 19:5; Deuteronomy 7:6; Deuteronomy 32:9; 1 Kings 8:53.

Psalm 135:4 Parallel Commentaries

Introduction. Chapter i. --The Life and Writings of St. Hilary of Poitiers.
St. Hilary of Poitiers is one of the greatest, yet least studied, of the Fathers of the Western Church. He has suffered thus, partly from a certain obscurity in his style of writing, partly from the difficulty of the thoughts which he attempted to convey. But there are other reasons for the comparative neglect into which he has fallen. He learnt his theology, as we shall see, from Eastern authorities, and was not content to carry on and develop the traditional teaching of the West; and the disciple …
St. Hilary of Poitiers—The Life and Writings of St. Hilary of Poitiers