That is from chapter vii. In chapter xx. there are further instructions
of a like horrible kind:

Thus shalt thou do unto all the cities which are very far off
from thee, which are not of the cities of these nations.

But of the cities of these people, which the Lord thy God doth
give thee for an inheritance, thou shalt save alive nothing
that breatheth:

But thou shalt utterly destroy them; namely, the Hittites, and
the Amorites, the Canaanites, and the Perizzites, the Hivites,
and the Jebusites, as the Lord thy God hath commanded thee.

And here, in a long quotation, is an example of the mercy of Jahweh,
and his faculty for cursing:

The Lord shall make the pestilence cleave unto thee, until he
have consumed thee from off the land, whither thou goest to
possess it.

The Lord shall smite thee with a consumption, and with a
fever, and with an inflammation, and with an extreme burning,
and with the sword, and with blasting, and with mildew; and
they shall pursue thee until thou perish.

And thy heaven that is over thy head shall be brass, and the
earth that is under thee shall be iron.

The Lord shall make the rain of thy land powder and dust: