Hebrews 5:13

11 We have much to say about this, but it is hard to explain, because you are dull of hearing.

12 Although by this time you ought to be teachers, you need someone to reteach you the basic principles of God’s word. You need milk, not solid food!

For everyone who lives on milk is still an infant, inexperienced in the message of righteousness.

14 But solid food is for the mature, who by constant use have trained their senses to distinguish good from evil.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
For everyone who lives on milk is still an infant, inexperienced in the message of righteousness.
KJV
For every one that useth milk is unskilful in the word of righteousness: for he is a babe.
WEB
For everyone who lives on milk is not experienced in the word of righteousness, for he is a baby.
ASV
For every one that partaketh of milk is without experience of the word of righteousness; for he is a babe.
DARBY
For every one that partakes of milk [is] unskilled in the word of righteousness, for he is a babe;
BLB
For everyone partaking of milk [is] inexperienced in the word of righteousness, for he is an infant.
ÅB
For hver den som får melk, er ukyndig i rettferds ord, for han er jo et barn;
OTB
For enhver som lever på melk er ukjent med læren om rettferdighet, for han er fortsatt et spedbarn.
B1930
For hver den som får melk, er ukyndig i rettferds ord, for han er jo et barn;

Study notes (Tyndale)

Original text and word study

Cross references