Answer: ‘Abdullah ibn Mas‘ūd (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "A believer is neither a slanderer or an invoker of curse, nor is he indecent or foulmouthed." [Narrated by At-Tirmidhi]

Benefits of the Hadīth

1. Prohibition of all false and foul speech

2. Description of the believer's speech

Thirteenth Hadīth