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
Muhammad ibn Waasi’ (rahima-hullaah) used to say:
((If sins had an odour then nobody would be able to sit with me)).
The Evil of Craving for Wealth and Status – Imaam ibn Rajab al-Hanbalee
((Beware of sins which are treated as being minor, just like a people who encamp in the centre of a valley, so someone brings a stick of firewood and someone else brings a stick until they are therefore able to bake their bread. Likewise sins which are treated as being minor and for which the person is taken to account will destroy him)).
Musnad al-Imaam Ahmad – Volume 5, Page 331 and others