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حَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنْ عَاصِمٍ الْأَحْوَلِ، عَنْ عِكْرِمَةَ، عَنْ ابْنِ عَبَّاسٍ، قَالَ: سَافَرَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ سَفَرًا فَصَلَّى تِسْعَةَ عَشَرَ يَوْمًا رَكْعَتَيْنِ رَكْعَتَيْنِ . قَالَ ابْنُ عَبَّاسٍ: فَنَحْنُ نُصَلِّي فِيمَا بَيْنَنَا وَبَيْنَ تِسْعَ عَشْرَةَ رَكْعَتَيْنِ رَكْعَتَيْنِ، فَإِذَا أَقَمْنَا أَكْثَرَ مِنْ ذَلِكَ صَلَّيْنَا أَرْبَعًا. قَالَ أَبُو عِيسَى: هَذَا حَدِيثٌ غَرِيبٌ حَسَنٌ صَحِيحٌ.
Ibn Abbas narrated: The Messenger of Allah traveled on a journey and he prayed two Rak'ah for nineteen days. Ibn Abbas said: So when we would stay somewhere for nineteen (days) we would pray two Rak'ah , and if we stayed longer than that we would complete the Salat.
"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