'Oaks' in the Bible

So Abram moved his tent and went to live near the oaks of Mamre at Hebron, where he built an altar to the Lord.

One of the survivors came and told Abram the Hebrew, who lived near the oaks belonging to Mamre the Amorite, the brother of Eshcol and the brother of Aner. They were bound by a treaty with Abram.

Then the Lord appeared to Abraham at the oaks of Mamre while he was sitting in the entrance of his tent during the heat of the day.