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Grade : Hasan Sahih (Abu Ghuddah)
أَخْبَرَنَا عُثْمَانُ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا سَعِيدُ بْنُ سُلَيْمَانَ، عَنْ عَبَّادِ بْنِ الْعَوَّامِ، عَنْ سَعِيدِ بْنِ أَبِي عَرُوبَةَ، عَنْ أَبِي رَجَاءٍ، - قَالَ عُثْمَانُ هُوَ مُحَمَّدُ بْنُ سَيْفٍ - عَنْ مَطَرٍ الْوَرَّاقِ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لَيْسَ عَلَى رَجُلٍ بَيْعٌ فِيمَا لاَ يَمْلِكُ " .
It was narrated from 'Amr bin Shu'aib, from his father, that his grandfather said:"The Messenger of Allah said: 'No man is bound by a transaction involving the sale of something that he does not possess
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari