Mishkat al-Masabih 263, 264
‘Abdallah b. Mas'ud said:
If the learned were to guard learning
and entrust it to those who are worthy of it, they would thereby, rule
their contemporaries. But they have bestowed it on worldly people to
get thereby some of their worldly goods, and have been despised by
them. I heard your Prophet say, "If anyone makes the care of his
eternal welfare the sum total of his cares God will protect him from
worldly care, but if he has a variety of cares consisting of matters related to this world God will not be concerned in which of its wadis he
perishes.” Ibn Majah transmitted it, and Baihaqi transmitted it in Shu'ab al-iman from Ibn ‘Umar beginning with "If anyone makes the
care.”
وَعَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ: لَوْ أَنَّ أَهْلَ الْعِلْمِ صَانُوا الْعِلْمَ وَوَضَعُوهُ عِنْدَ أَهْلِهِ لَسَادُوا بِهِ أَهْلَ زَمَانِهِمْ وَلَكِنَّهُمْ بَذَلُوهُ لِأَهْلِ الدُّنْيَا لِيَنَالُوا بِهِ مِنْ دُنْيَاهُمْ فَهَانُوا عَلَيْهِمْ سَمِعْتُ نَبِيَّكُمْ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: «مَنْ جَعَلَ الْهُمُومَ هَمًّا وَاحِدًا هَمَّ آخِرَتِهِ كَفَاهُ اللَّهُ هَمَّ دُنْيَاهُ وَمَنْ تَشَعَّبَتْ بِهِ الْهُمُومُ فِي أَحْوَالِ الدُّنْيَا لَمْ يُبَالِ اللَّهُ فِي أَيِّ أَوْدِيَتِهَا هَلَكَ» . رَوَاهُ ابْنُ مَاجَه
وَرَوَاهُ الْبَيْهَقِيُّ فِي شُعَبِ الْإِيمَانِ عَنِ ابْنِ عُمَرَ مِنْ قَوْلِهِ: «مَنْ جَعَلَ الْهُمُومَ» إِلَى آخِره