٤ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ هِشَامِ بْنِ سَالِمٍ عَنْ أَبِي عُبَيْدَةَ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ مِنْ أَشَدِّ مَا فَرَضَ الله عَلَى خَلْقِهِ ذِكْرُ الله كَثِيراً ثُمَّ قَالَ لا أَعْنِي سُبْحَانَ الله وَالْحَمْدُ لله وَلا إِلَهَ إِلا الله وَالله أَكْبَرُ وَإِنْ كَانَ مِنْهُ وَلَكِنْ ذِكْرَ الله عِنْدَ مَا أَحَلَّ وَحَرَّمَ فَإِنْ كَانَ طَاعَةً عَمِلَ بِهَا وَإِنْ كَانَ مَعْصِيَةً تَرَكَهَا.
4. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hisham ibn Salim from abu ‘Ubayda from Abu ‘Abdillah  who has said the following: “Abu ‘Abd Allah  has said, ‘The most intensive obligation Allah has placed upon His creature is to speak of Allah (remember Him) a great deal.’ The Imam then said, ‘I did not mean thereby saying, “Glory belongs to Allah, all thanks belong to Allah, no one deserves to be worshipped except Allah and Allah is greater (than to be described),” even though they are a form of speaking of Allah. It is to remember Him (or speak of Him) when one encounters a lawful or an unlawful matter, thus, does not disobey Him if it is an act of worship and stays away from it if it is something unlawful to do.’” 