'Day of Battle' in the Bible

So it came about on the day of battle that neither sword nor spear was found in the hands of any of the people who were with Saul and Jonathan, but they were found with Saul and his son Jonathan.

The sons of Ephraim were archers equipped with bows,Yet they turned back in the day of battle.

“O God the Lord, the strength of my salvation,You have covered my head in the day of battle.

The horse is prepared for the day of battle,But victory belongs to the Lord.

Therefore a tumult will arise among your people,And all your fortresses will be destroyed,As Shalman destroyed Beth-arbel on the day of battle,When mothers were dashed in pieces with their children.

“So I will kindle a fire on the wall of RabbahAnd it will consume her citadelsAmid war cries on the day of battle,And a storm on the day of tempest.

Then the Lord will go forth and fight against those nations, as when He fights on a day of battle.