٢ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ ابْنِ مَحْبُوبٍ عَنْ أَبِي وَلادٍ قَالَ قَالَ أَبُو الْحَسَنِ مُوسَى (عَلَيهِ السَّلام) مَا مِنْ بَلاءٍ يَنْزِلُ عَلَى عَبْدٍ مُؤْمِنٍ فَيُلْهِمُهُ الله عَزَّ وَجَلَّ الدُّعَاءَ إِلا كَانَ كَشْفُ ذَلِكَ الْبَلاءِ وَشِيكاً وَمَا مِنْ بَلاءٍ يَنْزِلُ عَلَى عَبْدٍ مُؤْمِنٍ فَيُمْسِكُ عَنِ الدُّعَاءِ إِلا كَانَ ذَلِكَ الْبَلاءُ طَوِيلاً فَإِذَا نَزَلَ الْبَلاءُ فَعَلَيْكُمْ بِالدُّعَاءِ وَالتَّضَرُّعِ إِلَى الله عَزَّ وَجَلَّ. 
2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from ibn Mahbub from abu Wallad who has said the following: “Once abu al-Hassan Musa  said, ‘Whenever a misfortune is about to arrive upon a believing servant (of Allah), if Allah, the Most Majestic, the Most Holy, inspires him to pray and plead before Allah for help, the diversion of misfortune from him will take place very shortly. Whenever a misfortune is to arrive upon a believing servant (of Allah) and he is held back from praying, that misfortune will be upon him for a lengthier period of time. Whenever a misfortune befalls you, you must pray and plead before Allah for help and appeal to Allah, the Most Majestic, the Most Holy, to move it away.’” 