Genesis 1:19

¹⁹ And the evening and the morning were the fourth day.

Genesis 9:5

⁵ And surely your blood of your lives will I require; at the hand of every beast will I require it, and at the hand of man; at the hand of every man's brother will I require the life of man.

Great lights, as in luminaries, signify love and faith, and are called in Genesis 1:14-17 the sun, moon, and stars.