“The Shaytan said to the Lord of Glory: ‘By Your Glory O Lord, I will keep trying to misguide Your slaves so long as their souls are in their bodies.’ The Lord said, ‘By My Glory and Majesty, I will continue to forgive them so long as they ask My forgiveness.'” (Narrated by Ahmad in al-Musnad and classed as sahih by al-Albânî in Sahîh al-Jâmi’, 2/32)
Ibn taymiyyah: just as islam erases what came before it, repentance also erases what came before it. End Quote. [Majmoo’ al -Fatawaa, 22/12]
“The one who repents from sin is like the one who did not commit sin.” (Classed as hasan by al-Albaani in Saheeh Ibn Maajah, 3427).
“And verily, I am indeed forgiving to him who repents, believes (in My Oneness, and associates none in worship with Me) and does righteous good deeds, and then remains constant in doing them (till his death)” [Ta-Ha 20:82]
Shaqeeq al-Balkhee said: The sign of repentance (is): weeping at what has preceded, fear of falling into sin, leaving evil company and maintaining the company of the good. [Siyar A’laam an-Nubalaa. – Volume 9, Page 315]