Sayyiduna Imran bin Husayn (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "It is necessary for you to do as many deeds as you are able to, for Allah Almighty does not grow weary, while you grow weary."
This narration was recorded by Imam al-Tabarani in al-Mu'jam al-Kabir, and its chain is hasan (good).