'Day of Battle' in the Bible

So it came to pass in the day of battle, that there was neither sword nor spear found in the hand of any of the people who were with Saul and Jonathan. But with Saul and with Jonathan his son there was found.

which I have reserved against the time of trouble, against the day of battle and war?

The sons of Ephraim, being armed and carrying bows, turned back in the day of battle.

O lord LORD, the strength of my salvation, thou have covered my head in the day of battle.

The horse is prepared against the day of battle, but victory is from LORD.

Therefore a tumult shall arise among thy people, and all thy fortresses shall be destroyed, as Shalman destroyed Beth-arbel in the day of battle; the mother was dashed in pieces with her sons.

But I will kindle a fire in the wall of Rabbah, and it shall devour the palaces of it, with shouting in the day of battle, with a tempest in the day of the whirlwind.

Then LORD shall go forth, and fight against those nations, as when he fought in the day of battle.