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Grade : Sahih (Al-Albani)
حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، حَدَّثَنِي مُعَاوِيَةُ بْنُ صَالِحٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي قَيْسٍ، قَالَ سَمِعْتُ عَائِشَةَ، - رضى الله عنها - تَقُولُ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَتَحَفَّظُ مِنْ شَعْبَانَ مَا لاَ يَتَحَفَّظُ مِنْ غَيْرِهِ ثُمَّ يَصُومُ لِرُؤْيَةِ رَمَضَانَ فَإِنْ غُمَّ عَلَيْهِ عَدَّ ثَلاَثِينَ يَوْمًا ثُمَّ صَامَ .
Narrated Aisha, Ummul Mu'minin: The Messenger of Allah (ﷺ) used to count the days in Sha'ban in a manner he did not count any other month; then he fasted when he sighted the new moon of Ramadan; but if the weather was cloudy he counted thirty days and then fasted
"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