Genesis 18:1
And the LORD appeared to him in the plains of Mamre: and he sat in the tent door in the heat of the day;
Torrey's Topical Textbook—AKJV

Judges 4:20
Again he said to her, Stand in the door of the tent, and it shall be, when any man does come and inquire of you, and say, Is there any man here? that you shall say, No.
Torrey's Topical Textbook—AKJV