Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tabarani:13176 – Ibrāhīm b. Hāshim al-Baghawī > Saʿd b. Zunbūr > Sulaym b. Muslim al-Khashhāb > ʿUbaydullāh b. ʿUmar > Sālim > Ibn ʿUmar

[Machine] The Prophet ﷺ said, "Whoever leaves behind his heels will be in the Fire."  

الطبراني:١٣١٧٦ – حَدَّثَنَا إِبْرَاهِيمُ بْنُ هَاشِمٍ الْبَغَوِيُّ ثنا سَعْدُ بْنُ زُنْبُورٍ ثنا سُلَيْمُ بْنُ مُسْلِمٍ الْخَشَّابُ عَنْ عُبَيْدِ اللهِ بْنِ عُمَرَ عَنْ سَالِمٍ عَنِ ابْنِ عُمَرَ

أَنَّ النَّبِيَّ ﷺ قَالَ «مَا خَلْفَ الْكَعْبَيْنِ فَفِي النَّارِ»  

See similar narrations below:

Collected by Aḥmad, Suyūṭī
ahmad:20098 – ʿAffān > Wuhayb And Yazīd b. Zurayʿ > Dāwud > Abū Qazaʿah > al-Asqaʿ b. al-Aslaʿiʿan Samurah b. Jundub

The Prophet [SAW] said: "Whatever of the Izar comes below the ankles is in the Fire." (Using translation from Nasāʾī 5331)  

أحمد:٢٠٠٩٨ – حَدَّثَنَا عَفَّانُ حَدَّثَنَا وُهَيْبٌ وَيَزِيدُ بْنُ زُرَيْعٍ قَالَا حَدَّثَنَا دَاوُدُ عَنْ أَبِي قَزَعَةَ عَنِ الْأَسْقَعِ بْنِ الْأَسْلَعِعَنْ سَمُرَةَ بْنِ جُنْدُبٍ

عَنِ النَّبِيِّ ﷺ قَالَ مَا أَسْفَلَ مِنَ الْكَعْبَيْنِ مِنَ الْإِزَارِ فِي النَّارِ