John Gill Commentary Joshua 6:22

"And Joshua said unto the two men that had spied out the land, Go into the harlot`s house, and bring out thence the woman, and all that she hath, as ye sware unto her." — Joshua 6:22 (ASV)

But Joshua had said to the two men that had spied out the
country
Whom he had sent on that errand, (Joshua 2:1); and what follows he had said to them before the people entered into the city, and perhaps before the walls of it fell; and indeed from (Joshua 6:16Joshua 6:17), it appears to have been said at the time he gave the people orders to shout:

go into the harlot's house :
he does not mention her name but they full well knew who he meant:

and bring out from there the woman, and all that she has ;
not so much her substance, as her father's household, she had got together there, that they might be saved, as had been promised her:

as you swore to her ;
so that this order was partly on account of her kindness to them, (Joshua 6:17); and partly on account of the oath which they had taken, and which Joshua would have inviolably kept.