Abraham
Joel 2:25: I will make out to you for the lost years.
Joel 2:12-13: Genuine repentance is required for God to return those lost years.
Proverbs 28:13: Whoever conceals their sins does not prosper, but the one who confesses and renounces them finds mercy.
Luke 18:10-14: Parable of Pharisee and tax collector.
Revelation 3:16-19: Willingness to accept our condition.
Isaiah 58:11,12:  Be a repairer of the breach than a breaker.

Santosh
God will restore the lost years, when we repent and give our life to Christ. I have to submit my life to Him and so He could work in me. Do not delay in cleaning the house of God from any stain, if not then you are worldly.

Rajesh
Luke 7:46: To repair and restore things.

Biju
Revelation 3:16,17: Because you are lukewarm, and neither hot nor cold, I will spit you out of My mouth. Because you say, “I am rich, and have become wealthy, and have need of nothing,” and you do not know that you are wretched and miserable and poor and blind and naked. Allow the light of God through the Holy Spirit to shine in our hearts as a searchlight.
2 Corinthians 4:6: Light shall shine out of darkness.  Having the spirit of unity, not to be a divider but a repairer. Not by gossiping and building a wider gap but to be a repairer and bridging the gap.

Titus
Jesus went for the lost sheep by leaving the 99.
Joshua 21:45: Not one of the good promises which the Lord had made to the house of Israel failed; all came to pass.
2 Cor 1:20: For as many as are the promises of God, in Him they are yes; therefore also through Him is our Amen to the glory of God through us.