It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that one day the Messenger of Allah (peace and blessings be upon him) said to his Companions: "Is any of you fasting today?" They all remained silent, and Sayyiduna Abu Bakr (may Allah be pleased with him) said: I am, O Messenger of Allah. Then he (peace and blessings be upon him) said: "Has any of you visited a sick person today?" They all remained silent, and Sayyiduna Abu Bakr (may Allah be pleased with him) said: I have, O Messenger of Allah. Then he (peace and blessings be upon him) said: "Has any of you given charity today?" They all remained silent, and Sayyiduna Abu Bakr (may Allah be pleased with him) said: I have, O Messenger of Allah. Then the Messenger of Allah (peace and blessings be upon him) laughed so much that his laughter became visible, and then he said: "By the One in whose hand is my soul, none but a believer gathers all these in a single day, and he will certainly enter Paradise because of them."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7795