Sayyiduna Abu Hurayrah (may Allah be pleased with him) relates from the Prophet (peace and blessings be upon him): Some people passed by Sayyiduna Isa bin Maryam (peace be upon him), and Sayyiduna Isa (peace be upon him) said: One of these people will die today, if Allah wills. They went on. When they came back in the evening, they had bundles of firewood with them. Sayyiduna Isa (peace be upon him) said: Put them down. Then he said to the man about whom he had said that he would die today: Untie your bundle. He untied it, and in it there was a black snake. Sayyiduna Isa (peace be upon him) asked: What did you do today? He replied: I did nothing. Sayyiduna Isa (peace be upon him) said: Consider what you did today. He said: I did nothing, except that I had a piece of bread with me; a poor man passed by me and asked me, so I gave him some of it. Sayyiduna Isa (peace be upon him) said: Because of it, (death) has been averted from you.
Al-Tabarani recorded it in al-Mu'jam al-Awsat. Its chain contains a narrator, Ahmad bin Abi Shaybah, and I do not know him.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الزكاة / 4605