ENOfficial
He reported the Prophet (ﷺ) as saying in the course of the story about the Mahdi that a man will come to him and say, "Give me, give me, Mahdi," and he will pour into His garment as much as he is able to carry. Tirmidhi transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي قِصَّةِ الْمَهْدِيِّ قَالَ: " فَيَجِيءُ إِلَيْهِ الرَّجُلُ فَيَقُولُ: يَا مَهْدِيُّ أَعْطِنِي أَعْطِنِي. قَالَ: فَيَحْثِي لَهُ فِي ثَوْبِهِ مَا اسْتَطَاعَ أَنْ يَحْمِلَهُ ". رَوَاهُ التِّرْمِذِيّ
sunnah.com