Genesis 16:3

Genesis tells us that several of God’s ancient people had two wives. But that does not mean that to have two wives is right.

Abram’s wife was Sarai. Abram took Hagar as an extra wife. He did that because he had no son. God had promised that Abram would have a son. (See Genesis 15:4.) But Abram thought that he must do something. He thought that otherwise God’s promise would not happen. But God wanted Abram to trust him. God did not want Abram to marry Hagar. God gave Abram a son, by his wife Sarai, when the time was right. (See Genesis 21:1-2.) God wanted Abram to wait for that time.