Nehemiah 7:3 (BSB)

And I told them, “Do not open the gates of Jerusalem until the sun is hot. While the guards are on duty, keep the doors shut and securely fastened. And appoint the residents of Jerusalem as guards, some at their posts and some at their own homes.”

From Nehemiah 7. Also in the ESV.

Commentary on Nehemiah 7:3

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Nehemiah 7:1-4: God saith concerning his church (Isa 62:6), I have set watchmen upon thy walls, O Jerusalem! This is Nehemiah's care here; for dead walls, without living watchmen, are but a poor defence to a city. I. He appointed the porters, singers, and Levites, in their places to their work.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Nehemiah 7:3: And I said unto them, let not the gates of Jerusalem be opened until the sun be hot,.... Or until the heat of the day, or near noon; at least not till the sun had been up some time, and shone out clearly, and caused much heat; that if any enemies were near, or lying in wait, they might be discovered, and the inhabitants also...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Nehemiah 7:3: Let not the gates of Jerusalem be opened until the sun be hot, &c.--In the East it is customary to open the gates of a city at sunrise, and to bar them at sunset--a rule which is very rarely, and not except to persons of authority, infringed upon.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Nehemiah 7:3: And I said unto them, Let not the gates of Jerusalem be opened until the sun be hot; and while they stand by, let them shut the doors, and bar [them]: and appoint watches of the inhabitants of Jerusalem, every one in his watch, and every one [to be] over against his house. (a) That is, they who are mentioned, .