Genesis 1:5

1:5 God called the light “day” and the darkness “night.” There was evening, and there was morning, marking the first day.

Genesis 1:8

1:8 God called the expanse “sky.” There was evening, and there was morning, a second day.

Genesis 50:10

50:10 When they came to the threshing floor of Atad on the other side of the Jordan, they mourned there with very great and bitter sorrow. There Joseph observed a seven day period of mourning for his father.