Strong’s Greek
G1506 — heilikrines
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
εἰλικρινής
heilikrines — pronounced i-lik-ree-nace'
from heile (the sun's ray) and 2919; judged by sunlight, i.e. tested as genuine (figuratively):--pure, sincere. see GREEK for 2919
2 occurrences in the KJV.
Philippians 1:10
That ye may approve things that are excellent; that ye may be sincere and without offence till the day of Christ.
2 Peter 3:1
This second epistle, beloved, I now write unto you; in both which I stir up your pure minds by way of remembrance: