Two Qualities a Believer Cannot Have
ʿAbdullāh b. Masʿūd – Allāh be pleased with him – said:
A believer might harbour any [bad] quality, except treachery and lying.
Ibn Abī Shaybah, Kitāb Al-Īmān article 80, where Al-Albānī grades its chain of narration ṣaḥīḥ; and others
Also read
Related sayings.
Continuing to suspect people and conjecture about who did something wrong can make a person more sinful than the original perpetrator.
Ibn Masud on what truthfulness and lying lead to.