Strong’s Greek
G1787 — entos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἐντός
entos — pronounced en-tos'
from 1722; inside (adverb or noun):--within. see GREEK for 1722
2 occurrences in the KJV.
Matthew 23:26
Thou blind Pharisee, cleanse first that which is within the cup and platter, that the outside of them may be clean also.
Luke 17:21
Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.