The Evidence of Salvation is the Fruit of the Spirit

Matthew 7:15-20
You Will Know Them by Their Fruit
15 “Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravenous wolves. 16 You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? 17 Even so, every good tree bears good fruit, but a bad tree bears bad fruit. 18 A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Therefore by their fruits you will know them."

The fruit is as follows:

Galatians 5:22-23
"22 But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, 23 gentleness, self-control; against such things there is no law."

Another evidence of salvation is this:

1 John 3:13-15 "…13 So do not be surprised, brothers, if the world hates you. 14 We know that we have passed from death to life, because we love our brothers. The one who does not love remains in death. 15 Everyone who hates his brother is a murderer, and you know that eternal life does not reside in a murderer.…"