Verses with the word congregations in the Old Testament (3 verses):

Psalms 26:12
My foot standeth in an even place: in the congregations will I bless the LORD.

Psalms 68:26
Bless ye God in the congregations, even the Lord, from the fountain of Israel.

Psalms 74:4
Thine enemies roar in the midst of thy congregations; they set up their ensigns for signs.