In Judah is God known - The true God revealed himself to the Jews. The Israelites, after the separation of the tribes, had the same knowledge, but they greatly corrupted the Divine worship; though still God was great, even in Israel.
In Judah is God known - That is, he has made himself known there in a special manner; he has evinced his watchful care over the city so as to demand a proper acknowledgment; he has manifested himself there as he has not elsewhere. It is true that God is known, or makes himself known everywhere; but it is also true that he does this in some places, and at some times, in a more marked and striking manner than he does in other places and at other times. The most clear and impressive displays of his character are among his own people - in the church. “His name is great in Israel.” Among the people of Israel; or, among his own people. The meaning here is, that, by some act referred to in the psalm, he had so displayed his power and his mercy in favor of that people, as to make it proper that his name should be exalted or praised.
“In Judah is God known:
His name is great in Israel.
In Salem also is His tabernacle,
And His dwelling place in Zion.
There brake He the arrows of the bow,
The shield, and the sword, and the battle. PK 362.1
“Thou art more glorious and excellent
Than the mountains of prey.
The stouthearted are spoiled, they have slept their sleep:
And none of the men of might have found their hands.
At Thy rebuke, O God of Jacob,
Both the chariot and horse are cast into a dead sleep. PK 362.2
“Thou, even Thou, art to be feared:
And who may stand in Thy sight when once Thou art angry?
Thou didst cause judgment to be heard from heaven;
The earth feared, and was still,
When God arose to judgment,
To save all the meek of the earth. PK 362.3