Allah Almighty says: {O you who believe, avoid much of the suspicion, for some suspicions are sin} [Surat al-Hujurāt: 12]
1573/1- Abu Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah (may Allah’s peace and blessings be upon him) said: “Beware of suspicion, for suspicion is the falsest of speech.” [Narrated by Al-Bukhāri and Muslim]
1) The Hadīth warns of suspicion as it is one of the worst types of lying.
2) Thinking well of Muslims is a sign of sincere faith.