+ bethink themselves, breast, comfortably, courage, ((faint), (tender-)heart((-ed)), midst, mind, X unawares, understanding

Concise Bible Dictionary:

Used typically for the source of nourishment. Israel “shall suck the breast of kings” (Isa. 60:16; compare Isa. 49:23; see also Job 24:9; Isa. 66:11).

Strong’s Dictionary of Hebrew Words:

Transliteration:
lebab
Phonic:
lay-bawb’
Meaning:
from 3823; the heart (as the most interior organ); used also like 3820
KJV Usage:
+ bethink themselves, breast, comfortably, courage, ((faint), (tender-)heart((-ed)), midst, mind, X unawares, understanding