Al-Kāfi - Volume 2 > Obeying the Creature in Disobedience to the Creator
Hadith #3

3ـ عَنْهُ عَنْ شَرِيفِ بْنِ سَابِقٍ عَنِ الْفَضْلِ بْنِ أَبِي قُرَّةَ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ كَتَبَ رَجُلٌ إِلَى الْحُسَيْنِ (صَلَّى اللهُ عَلَيْهِ وآلِه) عِظْنِي بِحَرْفَيْنِ فَكَتَبَ إِلَيْهِ مَنْ حَاوَلَ أَمْراً بِمَعْصِيَةِ الله كَانَ أَفْوَتَ لِمَا يَرْجُو وَأَسْرَعَ لِمَجِي‏ءِ مَا يَحْذَرُ.

3. It is narrated from him (narrator of the Hadith above) from Sharif ibn Sabiq from al-Fadl ibn abu Qarrah from abu Qurrah from abu ‘Abd Allah (a.s.) who has said the following: “Once, a man wrote al-Husayn (a.s.) asking, ‘Instruct me with good advice in two letters.’ The Imam wrote back to him, ‘Whoever seeks to acquire something by means of what angers Allah (his deed as such) will be most harmful to his hopes and most hastening to the coming of that which frightens him.’”