Psalms 78:41 - Clarke's commentary and critical notes on the Bible

Yea, they turned back and tempted God, and limited the Holy One of Israel. Limited the Holy One of Israel - The Chaldee translates, "And the Holy One of Israel they signed with a sign." The Hebrew word התוו hithvu is supposed to come from the root תוה tavah, which signifies to mark; and hence the letter ת tau, which in the ancient Hebrew character had the form of a cross X, had its name probably because it was used as a mark. Mr. Bate observes that in hithpael it signifies to challenge or accuse; as one who gives his quark or pledge upon a trial, and causes his adversary to do the same. Here it most obviously means an insult offered to God.