ـ رسولُ اللهِ‏ِ (صَلَّيَ اللهُ عَلَيهِ وَ آلِهِ) : إذا عَمِلْتَ عَمَلاً فاعْمَلْ للّه‏ِ خالِصاً ؛ لأ نَّهُ لا يَقْبَلُ مِن عِبادِهِ الأعْمالَ إلّا ما كانَ خالِصاً.

‪The Prophet (SAWA) said, ‘If you perform an action, do it sincerely for the sake of Allah because He only accepts from His servants those actions that have been performed sincerely.’[Bihar al-Anwar, v. 77, p. 103, no. 1]