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
quran:37:29 –

The oppressors will say, "Rather, you ˹yourselves˺ were not believers,  

They, the ones who were followed, say, to them ˹the followers˺: ‘On the contrary! You were ˹simply˺ not believers, for it would only be true that we led you astray if you had actually been believers ˹in the first place˺ and then rejected faith and followed us.
القرآن:٣٧:٢٩ –

قَالُوا بَلْ لَمْ تَكُونُوا مُؤْمِنِينَ  

{قالوا} أي المتبعون لهم {بل لم تكونوا مؤمنين} وإنما يصدق الإضلال منا أن لو كنتم مؤمنين فرجعتم عن الإيمان إلينا.

See similar narrations below:

Collected by Ibn Mājah
ibnmajah:1461 – Muḥammad b. al-Muṣaffá al-Ḥimṣī > Baqiyyah b. al-Walīd > Mubashhir b. ʿUbayd > Zayd b. Aslam > ʿAbdullāh b. ʿUmar

‘Let the honest wash your dead.”  

ابن ماجة:١٤٦١ – حَدَّثَنَا مُحَمَّدُ بْنُ الْمُصَفَّى الْحِمْصِيُّ حَدَّثَنَا بَقِيَّةُ بْنُ الْوَلِيدِ عَنْ مُبَشِّرِ بْنِ عُبَيْدٍ عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ لِيُغَسِّلْ مَوْتَاكُمُ الْمَأْمُونُونَ