Additionally, Timna, a concubine of Esau's son Eliphaz, gave birth to Amalek. These are the grandsons of Esau's wife Adah.

Genesis 36:11
The sons of Eliphaz were Teman, Omar, Zepho, Gatam, and Kenaz.

Genesis 36:13
These are the sons of Reuel: Nahath, Zerah, Shammah, and Mizzah. They are the grandsons of Esau's wife Basemath.

Exodus 17:8
After this, the Amalekites came and attacked the Israelites at Rephidim.

Numbers 24:20
Then Balaam saw Amalek and lifted up an oracle, saying: "Amalek was first among the nations, but his end is destruction."

Deuteronomy 25:17
Remember what the Amalekites did to you along your way from Egypt,

1 Samuel 15:2
This is what the LORD of Hosts says: 'I witnessed what the Amalekites did to the Israelites when they ambushed them on their way up from Egypt.

1 Samuel 15:3
Now go and attack the Amalekites and devote to destruction all that belongs to them. Do not spare them, but put to death men and women, children and infants, oxen and sheep, camels and donkeys.'"

And Timna was concubine to Eliphaz Esau's son; and she bore to Eliphaz Amalek: these were the sons of Adah Esau's wife.