Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "My description is that I am Ahmad, the one who places his trust (in Allah); I am neither harsh-tempered nor hard-hearted. I am the one who repays good with good and does not repay evil (with evil); whose birthplace is Makkah and whose place of emigration is Madinah. The people of his Ummah will be those who praise (Allah) much; they will wear their lower garments to the middle of their shins and will wash their limbs in ablution. In their breasts I will be their light. They will form rows for prayer just as they form rows for battle. That by which they will draw near to Me is their lives (blood). They will be devout worshippers by night and lions (that is, fighters) by day."
Al-Tabarani recorded it, and its chain contains narrators whom I do not know.