Hadith 5695
Sayyidah Umm Darda’ (may Allah be pleased with her) narrates from Sayyiduna Abu Darda’ (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) said: “On the Day of Resurrection, the heaviest thing to be placed in the believer’s record of deeds will be good character, and indeed Allah Almighty dislikes the person who is foul-mouthed and uses obscene language.”