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.
tirmidhi:2166Yaḥyá b. Mūsá > ʿAbd al-Razzāq > Ibrāhīm b. Maymūn > Ibn Ṭāwus from his father > Ibn ʿAbbās

"Allah's Hand is with the Jama'ah."  

الترمذي:٢١٦٦حَدَّثَنَا يَحْيَى بْنُ مُوسَى حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا إِبْرَاهِيمُ بْنُ مَيْمُونٍ عَنِ ابْنِ طَاوُسٍ عَنْ أَبِيهِ عَنِ ابْنِ عَبَّاسٍ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ يَدُ اللَّهِ مَعَ الْجَمَاعَةِ هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ لاَ نَعْرِفُهُ مِنْ حَدِيثِ ابْنِ عَبَّاسٍ إِلاَّ مِنْ هَذَا الْوَجْهِ