REWARD FOR HUNGER H 516 "There were some people who, when stood in prayer with the Prophet, praise and peace be upon him, fainted on account of extreme hunger. These Companions were known as Suffa. The villagers thought them to be insane. As soon as the prayer had finished, the Prophet, praise and peace be upon him, would go to them and say: 'If you only knew what there is waiting for you with Allah, the Exalted, you would wish to have your hunger and lack of provisions increased.'" R 516 Tirmidhi with a chain up to Fazalah, the son of Ubaid who related this hadith.
514- وعن فُضَالَةَ بن عبيدٍ رضي الله عنه : أنَّ رسول الله صلى الله عليه وآله وسلم كَانَ إِذَا صَلَّى بِالنَّاسِ ، يَخِرُّ رِجَالٌ مِنْ قَامَتِهِمْ في الصَّلاةِ مِنَ الخَصَاصَةِ - وَهُمْ أصْحَابُ الصُّفَّةِ - حَتَّى يَقُولَ الأعْرَابُ : هؤُلاء مَجَانِينٌ . فَإذَا صلَّى رسول الله صلى الله عليه وآله وسلم انْصَرَفَ إلَيْهِمْ ، فَقَالَ : "لَوْ تَعْلَمُونَ مَا لَكُمْ عِنْدَ اللهِ تَعَالَى ، لأَحْبَبْتُمْ أنْ تَزْدَادُوا فَاقَةً وَحَاجَةً" رواه الترمذي ، وقال : "حديث صحيح" . " الخَصَاصَةُ" : الفَاقَةُ وَالجُوعُ الشَّدِيدُ .