Mishkat al-Masabih, hadith 2308

وَعَنِ عَبْدِ الرَّحْمَنِ بْنِ أَبِي بَكْرَةَ قَالَ: قُلْتُ لِأَبِي: يَا أَبَتِ أَسْمَعُكَ تَقُولُ كُلَّ غَدَاةٍ: «اللَّهُمَّ عَافِنِي فِي بَدَنِي اللَّهُمَّ عَافِنِي فِي سَمْعِي اللَّهُمَّ عَافِنِي فِي بَصَرِي لَا إِلَهَ إِلَّا أَنْتَ» تُكَرِّرُهَا ثَلَاثًا حِينَ تُصْبِحُ وَثَلَاثًا حِين تمسي فَقَالَ: يَا بُنَيَّ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَدْعُو بِهِنَّ فَأَنَا أُحِبُّ أَنْ أستن بسننه. رَوَاهُ أَبُو دَاوُد

‘Abd ar-Rahman b. Abu Bakra said that he remarked to his father that he had heard him say every morning, “O God, grant me soundness in my body; O God, grant me soundness in my hearing; O God, grant me soundness in my sight. There is no god but Thee and that he repeated it three times morning and evening. He replied, "Sonny, I heard God’s messenger using these words as a supplication and I like to follow his practice." Abu Dawud transmitted it.