Numbers 1:8King James Version

Genesis 30:18

And Leah said, God hath given me my hire, because I have given my maiden to my husband: and she called his name Issachar.

Genesis 35:23

The sons of Leah; Reuben, Jacob’s firstborn, and Simeon, and Levi, and Judah, and Issachar, and Zebulun:

Genesis 46:13

And the sons of Issachar; Tola, and Phuvah, and Job, and Shimron.

Genesis 49:14

Issachar is a strong ass couching down between two burdens:

Exodus 1:3

Issachar, Zebulun, and Benjamin,