Narrated by Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) himself mentioned the major sins or someone asked him about them. In any case, the Messenger of Allah (peace and blessings be upon him) said: Associating partners with Allah, killing a soul, and disobeying parents. Then the Messenger of Allah (peace and blessings be upon him) said: Shall I not inform you of the greatest of sins? And that is false speech or giving false testimony. Imam Shu’bah says: I am more inclined to think that the Messenger of Allah (peace and blessings be upon him) spoke about giving false testimony.