Psalms 74:8 - Matthew Poole's English Annotations on the Holy Bible

Destroy them together, root and branch, one as well as another, or all at once. So they desired, and many of them intended, although afterwards, it seems, they changed their counsel, and carried some away captives, and left others to manage the land. All the synagogues of God in the land, i.e. all the public places wherein the Jews used to meet together to worship God every sabbath day, as is noted, Acts 13:27, and upon other occasions. That the Jews had such synagogues is manifest, both from these and other places of Scripture; and from the testimony of the Hebrew doctors, and other ancient and learned writers, who affirm it, and particularly of Jerusalem, in which they say there were above four hundred synagogues; and from the nature and necessity of the thing; for seeing it is undeniable that they did worship God publicly, in every sabbath, and other holy times, even then when they neither did nor could go up to Jerusalem, both conscience and prudence must needs direct them to appoint convenient places for that purpose.