Musannaf Ibn Abi Shayba 33:834

Yahya ibn Wadih narrated to us, from Musa ibn Ubaydah, from Abu Abdullah al-Qarrat, from Mu'adh ibn Jabal, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever loves to graze in the meadows of Paradise, let him increase the remembrance of Allah."