The Messenger of Allah ﷺ said, "No two Muslims meet and shake hands without being forgiven before they part."
حدثنا أبو بكر بن أبي شيبة حدثنا أبو خالد وابن نمير عن الأجلح عن أبي إسحق
قال رسول الله ﷺ ما من مسلمين يلتقيان فيتصافحان إلا غفر لهما قبل أن يفترقا
[Its chain is daif]. Ibn Majah also narrated it in the Book of Manners, Chapter on Handshaking, no. 3703, from Bakr bin Abu Shayba by the same route, and it is found in al-Musannaf: 8/431. Tirmidhi also narrated it, no. 2727, and its chain is daif, since Abu Ishaq used ambiguous transmission wording (anana). The hadith has weak supporting narrations.