clave. Hebrew. baka' (in Piel), implying repeated cleaving.
rocks. Hebrew. zur. Same word as in Exodus 17. The two events brought together here.
drink as out of. Some codices, with seven early printed editions, read "drink in the".
Related Commentaries of Psalms 78:15
Psalms 78:15
15 He clave the rocks in the wilderness, and gave them drink as out of the great depths.