Musnad Abu Ya'la al-Mawsili 140:38

Abu al-Rabi' al-Zahrani narrated to us, Hammad narrated to us, Yazid al-Raqashi narrated to us, from Anas ibn Malik, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever is pleased by [the extension of] his life and the increase in his provision, then let him maintain his ties of kinship."