Jami` at-Tirmidhi 2695
جامع الترمذي#2695Hasanحَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا ابْنُ لَهِيعَةَ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لَيْسَ مِنَّا مَنْ تَشَبَّهَ بِغَيْرِنَا لاَ تَشَبَّهُوا بِالْيَهُودِ وَلاَ بِالنَّصَارَى فَإِنَّ تَسْلِيمَ الْيَهُودِ الإِشَارَةُ بِالأَصَابِعِ وَتَسْلِيمَ النَّصَارَى الإِشَارَةُ بِالأَكُفِّ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ إِسْنَادُهُ ضَعِيفٌ . وَرَوَى ابْنُ الْمُبَارَكِ هَذَا الْحَدِيثَ عَنِ ابْنِ لَهِيعَةَ فَلَمْ يَرْفَعْهُ .
Narrated 'Amr bin Shu'aib:from his father, from his grandfather, that the Messenger of Allah (ﷺ) said: "He is not one of us who resembles other than us, no who resembles the Jews nor the Christians. For indeed greeting of the Jews is pointing the finger, and the greeting of the Christians is waving with the hand
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 42:8