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حَدَّثَنَا مُحَمَّدٌ، قَالَ حَدَّثَنَا يَحْيَى بْنُ صَالِحٍ، حَدَّثَنَا مُعَاوِيَةُ بْنُ سَلاَّمٍ، حَدَّثَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ، عَنْ عِكْرِمَةَ، قَالَ قَالَ ابْنُ عَبَّاسٍ ـ رضى الله عنهما ـ قَدْ أُحْصِرَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَحَلَقَ رَأْسَهُ وَجَامَعَ نِسَاءَهُ، وَنَحَرَ هَدْيَهُ، حَتَّى اعْتَمَرَ عَامًا قَابِلاً
Narrated By Ibn 'Abbas : Allah's Apostle was prevented from performing ('Umra) Therefore, he shaved his head and had sexual relations with his wives and slaughtered his Hadi and performed Umra in the following year.
"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