childish
3 occurrences across the corpus
King James Version
1 Corinthians 13:11
When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.
OT Pseudepigrapha
The Sibylline Oracles 2:206
Terrible, childish, not perceiving this,
The Sibylline Oracles 4:207
In childish folly, in their violence