.لسعد الخیر- اُوصِيكَ بِتَقوَى اللَّهِ؛ فإنّ فيها السَّلامَةَ مِن التَّلَفِ، والغَنيمَةَ في المُنقَلَبِ

speaking to Sad al-Khayr said, 'I advise you to be wary of your duty to Allah, for in it is safety from ruin and a gain in the Hereafter.

al-Kafi, v. 8, p. 52, no. 16