It is narrated from Sayyiduna Imran bin Husayn (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Is none of you able to do deeds equal to (the mountain of) Uhud every day?" The Companions said: O Messenger of Allah, who is able to do deeds equal to (the mountain of) Uhud every day? He (peace and blessings be upon him) said: "All of you are able to." The Companions said: O Messenger of Allah, what is it? He (peace and blessings be upon him) said: "Subhan Allah (Glory be to Allah) is greater than Uhud, La ilaha illallah (there is no god but Allah) is greater than Uhud, Al-hamdu lillah (praise be to Allah) is greater than Uhud, and Allahu akbar (Allah is the Greatest) is greater than Uhud."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15489