He wrote on the tablets, according to the first writing, the ten commandments, which the LORD spoke to you on the mountain out of the middle of the fire in the day of the assembly; and the LORD gave them to me.
Genesis 1:5
God called the light “day”, and the darkness he called “night”. There was evening and there was morning, the first day.
Genesis 2:11
The name of the first is Pishon: it flows through the whole land of Havilah, where there is gold;
Genesis 4:4
Abel also brought some of the firstborn of his flock and of its fat. The LORD respected Abel and his offering,
Genesis 4:19
Lamech took two wives: the name of the first one was Adah, and the name of the second one was Zillah.
Genesis 8:5
The waters receded continually until the tenth month. In the tenth month, on the first day of the month, the tops of the mountains were visible.