Parallel
Hebrews 5:12
Clementine Vulgate · Berean Standard Bible
Etenim cum deberetis magistri esse propter tempus, rursum indigetis ut vos doceamini quæ sint elementa exordii sermonum Dei : et facti estis quibus lacte opus sit, non solido cibo.
Although by this time you ought to be teachers, you need someone to reteach you the basic principles of God’s word (note: Or of the oracles of God). You need milk, not solid food!