Just as the wages/reward of sin is death, so do the wages/reward of righteousness bring eternal life.
Proverbs 12:28
In the way of righteousness is life: and in the pathway thereof there is no death.
righteousness and its root in Greek
Lexicon Greek 1343 [ from the root of 1342]
dikaiosune {dik-ah-yos-oo'-nay}
1) in a broad sense: state of him who is as he ought to be, righteousness, the condition acceptable to God
a) the doctrine concerning the way in which man may attain a state approved of God
b) integrity, virtue, purity of life, rightness, correctness of thinking feeling, and acting
2) in a narrower sense, justice or the virtue which gives each his due
Lexicon Greek 1342 dikaios {dik'-ah-yos}
1) righteous, observing divine laws
a) in a wide sense, upright, righteous, virtuous, keeping the commands of God
1) of those who seem to themselves to be righteous, who pride themselves to be righteous, who pride themselves in their virtues, whether real or imagined
2) innocent, faultless, guiltless
3) used of him whose way of thinking, feeling, and acting is wholly conformed to the will of God, and who therefore needs no rectification in the heart or life
a) only Christ truly
4) approved of or acceptable of God
b) in a narrower sense, rendering to each his due and that in a judicial sense, passing just judgment on others, whether expressed in words or shown by the manner of dealing with them
Blessed are they which are persecuted for righteousness' sake: for theirs is the kingdom of heaven.
And these shall go away into everlasting punishment: but the righteous into life eternal.