'Infants' in the Bible

and they said to Him, “Do You hear what these children are saying?” And Jesus replied to them, “Yes; have you never read [in the Scripture], ‘Out of the mouths of infants and nursing babies You have prepared and provided praise for Yourself’?”

However, brothers and sisters, I could not talk to you as to spiritual people, but [only] as to worldly people [dominated by human nature], mere infants [in the new life] in Christ!