Maliks Muwatta Book 47, Hadith Number 16.

Section : Shunning People.

Yahya related to me from Malik from Ata ibn Abi Muslim that Abdullah al-Khurasani said, “The Messenger of Allah, may Allah bless him and grant him peace, said, ‘Shake hands and rancour will disappear. Give presents to each other and love each other and enmity will disappear.'”