Genesis 18:1

And the LORD appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day;
— Genesis 18:1, King James Version

In other translations

World English Bible (WEB)

Yahweh appeared to him by the oaks of Mamre, as he sat in the tent door in the heat of the day.

American Standard Version (ASV)

And Jehovah appeared unto him by the oaks of Mamre, as he sat in the tent door in the heat of the day;

Young's Literal Translation (YLT)

And Jehovah appeareth unto him among the oaks of Mamre, and he is sitting at the opening of the tent, about the heat of the day;