Psalms 18:16-18

He sent from above This may either denote, in general, that God assisted him by his divine power to overcome and deliver himself from his enemies, and thereby extricate himself from his troubles, or that he sent his angels from heaven to protect and rescue him from the many dangers that surrounded him; which he figuratively calls drawing him out of great waters Afflictions and great calamities being frequently represented by deep waters and floods in the sacred writings. Or, as Theodoret thinks, by these waters, he means the strong enemies mentioned in the next verse. They prevented me in the day of my calamity They were too crafty for me, and had almost surprised me, coming upon me suddenly, unawares, when I was unprepared and helpless; and would have destroyed me, had not God upheld and supported me when I was in danger of perishing. But God was my stay They could not prevent him; and, what a staff is to one who is ready to fall, that was God to me in the time of my extremity.