Strong’s Greek
G728 — arrhabon
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀρραβών
arrhabon — pronounced ar-hrab-ohn'
of Hebrew origin (6162); a pledge, i.e. part of the purchase-money or property given in advance as security for the rest:--earnest. see HEBREW for 06162
3 occurrences in the KJV.
2 Corinthians 1:22
Who hath also sealed us, and given the earnest of the Spirit in our hearts.
2 Corinthians 5:5
Now he that hath wrought us for the selfsame thing is God, who also hath given unto us the earnest of the Spirit.
Ephesians 1:14
Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.