Hebrews 5:14
But solid food is for the mature, who by constant use have trained their senses to distinguish good from evil.
Berean Standard Bible
But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.
But solid food is for those who are full grown, who by reason of use have their senses exercised to discern good and evil.