As for those who attained to faith and did righteous works and believed in what was revealed to Muhammad - which indeed is the Truth from their Lord - Allah has remitted their evil deeds and has set their condition right.   (Quran 47:2)

Hadith - Sayings of Prophet Muhammad [Peace be upon him]

Hadith Collections
1. The Prophetic Way of Life (Rah-e-Amal) [Al Hasanat Books]
2. The Provision for Akhirah (Zad-e-Rah) [Islamic Research Academy Karachi]
3. Riyad as Saliheen (Ref: Guidedways.com)
Hadith Study Guidelines and Resources
1. The Science of Hadith (Ref: Islamic-awareness.org)
2. The Prevalence of Concocted and Weak Traditions (Hadith)