حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنْ أُسَامَةَ بْنِ زَيْدٍ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، عَنْ جَابِرٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ سَلُوا اللَّهَ عِلْمًا نَافِعًا وَتَعَوَّذُوا بِاللَّهِ مِنْ عِلْمٍ لاَ يَنْفَعُ ‏"‏ ‏.‏

It was narrated from 'Umar that the

Prophet saas used to seek refuge with Allah from cowardice, miserliness, old age, the torment of the grave and the tribulation of the heart. (Da'if)(One of the narrators) Waki' said: "Meaning when a man dies in a state of tribulation (Fitnah) and does not ask Allah to forgive him."