Al-Kāfi
Hadith 4883ـ عَنْهُ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ مُرَازِمِ بْنِ حَكِيمٍ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ كَانَ أَبِي يَقُولُ إِذَا هَمَمْتَ بِخَيْرٍ فَبَادِرْ فَإِنَّكَ لا تَدْرِي مَا يَحْدُثُ.
3. It is narrated from him (narrator of the Hadith above) from Ibn Abi ‘Umayr from Marazim ibn Hakim from Abu ‘Abdillah (a.s.) who has said the following: “My father (a.s.) would say, ‘When you intend to perform a good deed, do not delay; you may not know what happens next.’”