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Grade : Sahih (Abu Ghuddah)
أَخْبَرَنَا عِيسَى بْنُ إِبْرَاهِيمَ بْنِ مَثْرُودٍ، عَنِ ابْنِ وَهْبٍ، قَالَ أَخْبَرَنِي يُونُسُ، قَالَ ابْنُ شِهَابٍ أَخْبَرَنِي عُبَيْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ أَبَاهُ، قَالَ بَاتَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِذِي الْحُلَيْفَةِ بِبَيْدَاءَ وَصَلَّى فِي مَسْجِدِهَا .
Ubaidullah bin 'Abdullah bin 'Umar narrated that his father said:"The Messenger of Allah stayed overnight in dhul-Hulaifah, where he started his Hajj with this action, and he prayed in the Masjid there.''(sahih)
"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