It is narrated from Sayyiduna Anas bin Malik, may Allah be pleased with him, that he said: When the people of Yemen came, the Prophet, peace and blessings be upon him, said: "The people of Yemen have come, and they are more soft-hearted than you." And they were the first people to introduce handshaking.
Hadith Referenceالادب المفرد / كتاب السلام / 967
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : سنن أبى داؤد ، الأدب : 5213»