Nehemiah
Nehemiah 4:18ESV·traditional attribution

And each of the builders had his sword strapped at his side while he built. The man who sounded the trumpet was beside me.

Matthew Henry Presbyterian @wholebiblehenry

When the builders had so far reason to think the design of the enemies broken as to return to their work, yet they were not so secure as to lay down their arms, knowing how restless and unwearied they were in their attempts, and that, if one design failed, they would be hatching another.

Commenting on Nehemiah 4:16-23

John Gill Reformed Baptist @doctorgill

For the builders had everyone his sword girded by his side, and so builded,.... Thus accoutred he wrought, and was prepared for either service: and he that sounded the trumpet was by me; to give the alarm of war, that everyone might lay aside his work, and prepare for the battle: this officer stood by Nehemiah, that when he found it necessary, might give him...

Jamieson-Fausset-Brown Reformed @jfbcommentary

HE SETS A WATCH. (Neh. 4:7-23) But . . . when Sanballat . . . heard that the walls . . . were made up, and . . . the breaches . . . stopped--The rapid progress of the fortifications, despite all their predictions to the contrary, goaded the Samaritans to frenzy.

Commenting on Nehemiah 4:7-23