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 first-born, 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 49:14-15
Issachar is a strong ass, couching down between two burdens:
Deuteronomy 33:18
And of Zebulun he said, Rejoice, Zebulun, in thy going out; and Issachar, in thy tents.
1 Chronicles 12:32
And of the children of Issachar, who were men that had understanding of the times, to know what Israel ought to do; the heads of them were two hundred; and all their brethren were at their command.