Hadithcore
Riyad as-Salihin, 336

Abu Bakrah Nufai' bin Al-Harith (May Allah be pleased with him) reported:

Messenger of Allah (ﷺ) said, "Shall I not inform you of the biggest of the major sins?" Messenger of Allah (ﷺ) asked this question thrice. We said, "Yes, O Messenger of Allah. (Please inform us.)". He said, "Ascribing partners to Allah, and to be undutiful to your parents". Messenger of Allah (ﷺ) sat up from his reclining position and said, "And I warn you against giving forged statement and a false testimony; I warn you against giving forged statement and a false testimony". Messenger of Allah (ﷺ) kept on repeating that warning till we wished he would stop. <b>[Al-Bukhari and Muslim]</b>.

و عن أبي بكرة نفيع بن الحارث رضي الله عنه قال‏:‏ قال رسول الله صلى الله عليه وسلم‏:‏ ‏"‏ألا أنبئكم بأكبر الكبائر‏؟‏‏"‏ ثلاثًا قلنا‏:‏ بلى يا رسول الله‏:‏ قال‏:‏ ‏"‏الإشراك بالله، وعقوق الوالدين" وكان متكئاً فجلس، فقال: "ألا و قول الزور و شهادة الزور" فما زال يكررها حتى قلنا: ليته سكتز‏ ‏(‏‏(‏متفق عليه‏)‏‏)

References1 variant
In-Book Reference
Introduction, Hadith 336
Sharh · explanationclick to expand
<b>Guidance from the Hadiths:</b><br> 1) Undutifulness to one’s parents is one of the gravest major sins, and therefore it is mentioned along with associating partners with Allah Almighty.<br> 2) The Hadith strictly warns against giving a false testimony. The one who gives a false testimony has wronged himself for having committed a major sin, and wronged the one for whose interest the false testimony was given, since he authorized him to unlawfully consume what he does not deserve. He also wronged the one against whom the testimony was made since he committed injustice and transgression against him. For all these reasons, a false testimony is one of the gravest major sins.<br> 3) One should beware of these major sins: associating partners with Allah, undutifulness to parents, false statements, and false testimony given the evil consequences they lead to in the worldly life and the Hereafter.<br> 4) The Prophet (may Allah’s peace and blessings be upon him) showed to his nation the paths of good so that they would follow it, and also showed them the paths of evil so that they would beware of them.<br> <br> <br> <br> <b>Words in the Hadith:</b><br> False statements: this means lying, falsehood, and all obscene language. False testimony: lying in giving witness testimony. False testimony is included in false statements.
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