Nahj al-Balāgha
Hadith 1820٢٤٢. وَقَالَ (عليه السلام): اتَّقِ اللهَ بَعْضَ التُّقَى وَإِنْ قَلَّ، وَاجْعَلْ بَيْنَكَ وَبَيْنَ اللهِ سِتْراً وَإِنْ رَقَّ.
242. Amīr al-mu’minīn, peace be upon him, said: Fear Allāh to some degree (even) though it be little; and set a curtain between you and Allāh (even) though it be thin.