Psalm 19:2
"Day unto day uttereth speech, and night unto night sheweth knowledge."
Cross References (ranked by relevance)
Psalm 74:16
14
The day is thine, the night also is thine: thou hast prepared the light and the sun.
Genesis 8:22
While the earth remaineth, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
Isaiah 38:19
The living, the living, he shall praise thee, as I do this day: the father to the children shall make known thy truth.
Psalm 148:12
Both young men, and maidens; old men, and children: