In Matthew 12:33, Jesus says a tree is known by its fruit—same logic as cleaning inside first to make outside clean.

Matthew 15:11 declares that what comes out of the mouth defiles, emphasizing inner purity over external ritual.

Jeremiah 4:14 calls for washing the heart from evil, paralleling Jesus' demand to cleanse the inside first.

Ezekiel 18:31 urges a new heart and spirit, directly matching the inner renewal Jesus commands here.

Luke 6:45 teaches that the heart's treasure determines outward speech, reinforcing inner purity's priority.

Hebrews 10:22 mentions hearts sprinkled clean and bodies washed, reflecting the dual cleansing Jesus advocates.

Luke 11:40 makes the same point: the Creator made both inside and outside, reinforcing the call to inner purity.

James 4:8 commands both cleansing hands (outer) and purifying hearts (inner), echoing the inside-out principle.

In Isaiah 55:7, the call to forsake wicked thoughts parallels Jesus' command to clean the inside—both emphasize inner repentance.

1 Peter 3:4 similarly values the inner self over outward appearance — echoing the call to clean the inside.

2 Corinthians 7:1 urges cleansing from defilement of body and spirit, a broader call to both inner and outer purity.