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:8076 – Muḥammad b. Khālid al-Rāsibī > Muhallab b. al-ʿAlāʾ > Shuʿayb b. Bayān al-Ṣaffār > Ḥammād b. Salamah > Abū Ghālib > Abū Umāmah

[Machine] The Prophet of Allah ﷺ said: "When two Muslims shake hands, their palms should not be separated until their sins are forgiven."  

الطبراني:٨٠٧٦ – حَدَّثَنَا مُحَمَّدُ بْنُ خَالِدٍ الرَّاسِبِيُّ ثنا مُهَلَّبُ بْنُ الْعَلَاءِ ثنا شُعَيْبُ بْنُ بَيَانَ الصَّفَّارُ ثنا حَمَّادُ بْنُ سَلَمَةَ عَنْ أَبِي غَالِبٍ عَنْ أَبِي أُمَامَةَ

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «إِذَا تَصَافَحَ الْمُسْلِمَانِ لَمْ تَفْرُقْ أَكُفُّهُمَا حَتَّى يُغْفَرَ لَهُمْا»  

See similar narrations below:

Collected by Suyūṭī