John Gill Commentary Leviticus 14:41

"and he shall cause the house to be scraped within round about, and they shall pour out the mortar, that they scrape off, without the city into an unclean place:" — Leviticus 14:41 (ASV)

And he shall cause the house to be scraped within round about All the walls on each side, and at each end, and every stone in them; which, though they had no appearance on them, yet should there be any infection in them, which as yet was not seen, it might be removed, and a spread prevented: and they shall pour out the dust that they scrape off without the city, into an unclean place ; the scrapings they were to put into some vessel, and carry them thither and pour them out, or into a cart, and there throw them, that they might lie with other rubbish, and not be made use of any more.