Genesis 30:18-20

Then Leah said, “God has given me my reward because I have given my maid to my husband.” So she named him Issachar. Leah conceived again and gave birth to a sixth son for Jacob. Then Leah said, “God has endowed me with a good [marriage] gift [for my husband]; now he will live with me [regarding me with honor as his wife], because I have given birth to six sons.” So she named him Zebulun.