King James Version
And the LORD appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day;English Standard Version
And the LORD appeared to him by the oaks of Mamre, as he sat at the door of his tent in the heat of the day.Catholic Public Domain Version
Then the Lord appeared to him, in the steep valley of Mamre, when he was sitting at the door of his tent, in the very heat of the day