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.
suyuti:38-19b
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السيوطي:٣٨-١٩b

"أَنَّ النَّبِىَّ ﷺ مَرَّ بِمَجْلسٍ فِيهِ أَخْلَاطٌ مِنَ الْمُسْلِمينَ وَالْيَهُودِ فَسَلَّمَ عَلَيْهِمْ".  

[ت] الترمذي حسن صحيح

See similar narrations below:

Collected by Tirmidhī
tirmidhi:2702Yaḥyá b. Mūsá > ʿAbd al-Razzāq > Maʿmar > al-Zuhrī > ʿUrwah > Usāmah b. Zayd

that the Prophet ﷺ passed by a gathering in which the Muslims and the Jews were mixed, so he gave the Salam to them.  

Abū ʿĪsá said that this Ḥadīth is Ḥasan-Ṣaḥīḥ.
الترمذي:٢٧٠٢حَدَّثَنَا يَحْيَى بْنُ مُوسَى حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا مَعْمَرٌ عَنِ الزُّهْرِيِّ عَنْ عُرْوَةَ أَنَّ أُسَامَةَ بْنَ زَيْدٍ

أَخْبَرَهُ أَنَّ النَّبِيَّ ﷺ مَرَّ بِمَجْلِسٍ وَفِيهِ أَخْلاَطٌ مِنَ الْمُسْلِمِينَ وَالْيَهُودِ فَسَلَّمَ عَلَيْهِمْ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ