'Infant' in the Bible

Now go and strike Amalek and completely destroy everything that they have; do not spare them, but kill both man and woman, child and infant, ox and sheep, camel and donkey.’”

But Jehoshabeath, the king’s daughter, took Joash the [infant] son of Ahaziah and stole him away from among the king’s sons who were being put to death, and she placed him and his nurse in the bedroom. So Jehoshabeath, the daughter of King Jehoram [of Judah] and wife of Jehoiada the priest, hid Joash from [his grandmother] Athaliah so that she did not murder him (for Jehoshabeath was the sister of Ahaziah).

“No longer shall there be in it an infant who lives only a few days,Or an old man who does not finish his days;For the youth who dies at the age of a hundred,And the one who does not reach the age of a hundredWill be thought of as accursed.

Therefore now thus says the Lord God of hosts, the God of Israel, “Why did you commit this great evil against yourselves [bringing disaster] that will cut off from you man and woman, child and infant, out of Judah, leaving yourselves without a remnant?

Utterly slay old men, young men, maidens, little children, and women; but do not touch or go near anyone on whom is the mark. Begin at My sanctuary.” So they began with the old men who were in front of the temple [who did not have the Lord’s mark on their foreheads].

For everyone who lives on milk is [doctrinally inexperienced and] unskilled in the word of righteousness, since he is a spiritual infant.