Anas bin Malik reported,

The Messenger of Allah ﷺ said, "Tomorrow there will arrive among you a people whose hearts are softer toward Islam than yours."Then the Asharis arrived, and among them was Abu Musa Ashari. As they drew near Madinah, they began chanting in rajaz verse, saying, "Tomorrow we shall meet our beloved ones, Muhammad and his company."When they arrived, they shook hands with the people, and they were the first to introduce the practice of shaking hands.

Azami 14258

Sahih

عن أنس بن مالك قال

قال رسول الله ﷺ: يقدم عليكم غدا أقوام هم أرق قلوبا للإسلام منكم. قال: فقدم الأشعريون فيهم أبو موسى الأشعري فلما دنوا من المدينة جعلوا يرتجزون يقولون: غدا نلقى الأحبه محمدا وحزبه فلما أن قدموا تصافحوا، فكانوا هم أول من أحدث المصافحة.

الأعظمي 14258صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Superior moral conduct
Chapter
Etiquette of seeking permission and greetings
Section
Handshaking and embracing
Numbering
Jami al-Kamil 14258 (2nd edition)
Azami 14258