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.New International Version
The LORD appeared to Abraham near the great trees of Mamre while he was sitting at the entrance to his tent in the heat of the day.