12 ‘And if it doth not make peace with thee, and hath made with thee war, then thou hast laid siege against it,
13 and Jehovah thy God hath given it into thy hand, and thou hast smitten every male of it by the mouth of the sword.
14 Only, the women, and the infants, and the cattle, and all that is in the city, all its spoil, thou dost seize for thyself, and thou hast eaten the spoil of thine enemies which Jehovah thy God hath given to thee.
15 So thou dost do to all the cities which are very far off from thee, which are not of the cities of these nations.
16 ‘Only, of the cities of these peoples which Jehovah thy God is giving to thee [for] an inheritance, thou dost not keep alive any breathing;
17 for thou dost certainly devote the Hittite, and the Amorite, the Canaanite, and the Perizzite, the Hivite, and the Jebusite, as Jehovah thy God hath commanded thee,
18 so that they teach you not to do according to all their abominations which they have done to their gods, and ye have sinned against Jehovah your God.
19 ‘When thou layest siege unto a city many days, to fight against it, to capture it, thou dost not destroy its trees to force an axe against them, for of them thou dost eat, and them thou dost not cut down – for man’s [is] the tree of the field – to go in at thy presence in the siege.
20 Only, the tree, which thou knowest that it [is] not a fruit-tree, it thou dost destroy, and hast cut down, and hast built a bulwark against the city which is making with thee war till thou hast subdued it.

Deuteronomy 20

Now, go, and thou hast smitten Amalek, and devoted all that it hath, and thou hast no pity on it, and hast put to death from man unto woman, from infant unto suckling, from ox unto sheep, from camel unto ass.’

1 Samuel 15:3