Jami` at-Tirmidhi 2232

Zaid bin Al-'Ammi said:"I heard Abu As-Siddiq An-Naji narrate a Hadith from Abu Sa'eed Al-Khudri who said: 'We feared events to occur after our Prophet, so we asked Allah's Prophet(s.a.w), and he said: "Indeed there will be a Mahdi who comes in my Ummah (ruling) living for five, or seven, or nine."- Zaid was the one in doubt- He said: "We said: What is that?" He said: "Years." He said: "A man will come to him and say: O Mahdi! 'Give to me, give to me! So he will fill in his garment whatever he is able to carry