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Grade : Sahih (Al-Albani)
حَدَّثَنَا مَحْمُودُ بْنُ خَالِدٍ الدِّمَشْقِيُّ، حَدَّثَنَا الْوَلِيدُ بْنُ مُسْلِمٍ الدِّمَشْقِيُّ، عَنِ ابْنِ ثَوْبَانَ، عَنْ عَبْدَةَ بْنِ أَبِي لُبَابَةَ، عَنْ شَقِيقِ بْنِ سَلَمَةَ، قَالَ رَأَيْتُ عُثْمَانَ وَعَلِيًّا يَتَوَضَّآنِ ثَلاَثًا ثَلاَثًا وَيَقُولاَنِ هَكَذَا كَانَ وُضُوءُ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ . قَالَ أَبُو الْحَسَنِ بْنُ سَلَمَةَ حَدَّثَنَاهُ أَبُو حَاتِمٍ، حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ ثَابِتِ بْنِ ثَوْبَانَ، فَذَكَرَ نَحْوَهُ .
It was narrated that Shaqiq bin Salamah said:"I saw `Uthman and `Ali performing ablution, washing each part three times, and they said: 'This is how the Messenger of Allah used to perform ablution.'" (Hasan) Another chain with similar wording
"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