Adam Clarke on Psalms 122:9

Because of the house of the Lord our God - Particularly will I wish thee well, because thou art the seat of religion, the place where our merciful God has condescended to dwell.

To the captives in Babylon the Prophet Jeremiah had given this charge, Jer 29:7 : "And seek שלום shalom, the prosperity of the city, whither I have caused you to be carried captives, and pray unto the Lord for it; for in the prosperity thereof ye shall have prosperity."

Was this a duty for the captives? Yes. And is it the duty of every man for his own country! God, nature, common sense, and self-interest say, Yes! And what must we think of the wretches who not only do not thus pray, but labor to destroy the public peace, to subvert the government of their country, to raise seditions, and to destroy all its civil and religious institutions? Think of them! Why, that hemp would be disgraced by hanging them.

There is a fine picture given us here of the state of Jerusalem after the restoration of the Jews. The walls were finished, the city rebuilt, beautiful, strong, and regular, the temple and its worship were restored, the courts of justice were re-established, the constituted authorities in Church and state were doing their duty; and God was pouring out his blessing upon all. Who could see this without praying, May God increase thy peace, and establish thy prosperity for ever!