'Infant' in the Bible

Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.

There shall be no more thence an infant of days, nor an old man that hath not filled his days; for the child shall die a hundred years old, and the sinner being a hundred years old shall be accursed.

Therefore now thus saith Jehovah, the God of hosts, the God of Israel: Wherefore commit ye this great evil against your own souls, to cut off from you man and woman, infant and suckling, out of the midst of Judah, to leave you none remaining;