Arabic (Original)
حَدَّثَنَا حَسَنُ بْنُ مُوسَى حَدَّثَنَا ابْنُ لَهِيعَةَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ هُبَيْرَةَ عَنِ ابْنِ مُرَيْحٍ مَوْلَى عَبْدِ اللَّهِ بْنِ عَمْرٍو أَنَّهُ سَمِعَ عَبْدَ اللَّهِ بْنَ عَمْرٍو يَقُولُ مَنْ صَلَّى عَلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَاحِدَةً صَلَّى اللَّهُ عَلَيْهِ وَمَلَائِكَتُهُ سَبْعِينَ صَلَاةً.
English Translation
Hasan ibn Musa narrated to us: Ibn Lahi'ah narrated, Abdullah ibn Hubayrah narrated from Ibn Murayh, the freed slave of Abdullah ibn Amr, that he heard Abdullah ibn Amr saying: "Whoever sends blessings upon the Prophet (peace be upon him) once, Allah and His angels send blessings upon him seventy times."