She and Allan by H. Rider Haggard

At last we were on the plain, the bemused remnant of Rezu's army still doubling before us like a mob of game pursued by wild dogs. Here we halted to re-form our ranks; it seemed to me, although still she spoke no word, that some order reached me from the gleaming Ayesha that I should do this. The business took twenty minutes or so, and then, numbering about two thousand five hundred strong, for the rest had fallen in the fight of the square, we advanced again.

Now there came that dusk which often precedes the rising of the sun, and through it I could see that the battle was not yet over, since gathered in front of us was still a force about equal to our own. Ayesha pointed towards it with her wand and we leapt forward to the attack. Here the men of Rezu stood awaiting us, for they seemed to overcome their terror with the approach of day.