In Genesis, the LORD shut the door of Noah’s Ark after everyone entered.
Genesis 7:16 says that Noah, his family, and the animals entered the Ark as God had commanded, and then “the LORD shut him in.” The wording places the closing of the Ark’s door in God’s action rather than Noah’s.
This detail comes immediately before the Flood waters rise. It emphasizes that the occupants’ protection is part of the divine instruction and covenant story, not merely the result of Noah completing a construction project. Noah is described as following the commands he received, while the final closing is attributed to the LORD.
Popular artwork often shows Noah closing the door himself, but that is not what Genesis says. The text also does not identify a separate doorkeeper or angel. Translations may use “the LORD,” “the Lord,” or “God” depending on their conventions, but they refer to the same subject in this passage.