Riyad as-Salihin 889
Safwan bin 'Assal (May Allah be pleased with him) reported:
A Jew asked his companion to take him to the Prophet (ﷺ); and when they came to the Messenger of Allah (ﷺ), they asked him about the nine clear signs (given to Prophet Musa). Safwan narrated the long Hadith which concludes: They kissed the hands and feet of the Messenger of Allah (ﷺ) and said: "We testify that you are a Prophet." [At-Tirmidhi]
وعن صفوان بن عسال رضي الله عنه قال‏:‏ قال يهودي لصاحبه‏:‏ اذهب بنا إلي هذا النبي صلى الله عليه وسلم فأتيا رسول الله صلى  الله عليه وسلم ، فسألاه عن تسع آيات بينات؛ فذكر الحديث إلي قوله‏:‏ فقبلا يده ورجله، وقالا‏:‏ نشهد أنك نبي‏.‏ ‏(‏‏(‏رواه الترمذي وغيره بأسانيد صحيحة‏)‏‏)‏‏.‏