New Defender's Study Bible Notes
77:5 years of ancient times. The ways of God in ancient times, presumably those of Noah in particular, assured the psalmist, as they will us, that God has not “forgotten to be gracious” (Psalm 77:9). In a world of global violence, Noah “found grace in the eyes of the LORD” (Genesis 6:9) and was delivered from the evil world.
77:19 great waters. Psalm 77:16-19 seems to refer to the great waters of the Flood, but God also worked mightily in the days of Moses (Psalm 77:20).