“Salām, al-Malik al-Quddūs al-Salām” signifies His special regard and grace, and the security, peace, and well-being He grants His creatures. Yet I find no indication here of infallibility, since God’s salām encompasses the believers, even those who are not infallible!
يس : 58 سَلامٌ قَوْلاً مِنْ رَبٍّ رَحيمٍ
فِي عُيُونِ الْأَخْبَارِ بِإِسْنَادِهِ إِلَى يَاسِرٍ الْخَادِمِ قَالَ: سَمِعْتُ أَبَا الْحَسَنِ الرِّضَا عَلَيْهِ السَّلَامُ يَقُولُ: إِنَّ أَوْحَشَ مَا يَكُونُ هَذَا الْخَلْقُ فِي ثَلَثَةِ مَوَاطِنَ: يَوْمَ يُولَدُ وَ يَخْرُجُ مِنْ بَطْنِ أُمِّهِ فَيَرَى الدُّنْيَا، وَ يَوْمَ يَمُوتُ فَيُعَايِنُ الْآخِرَةَ وَ أَهْلَهَا، وَ يَوْمَ يُبْعَثُ فَيَرَى أَحْكَاماً لَمْ يَرَهَا فِي دَارِ الدُّنْيَا وَ قَدْ سَلَّمَ اللَّهُ عَزَّ وَ جَلَّ عَلَى يَحْيَى فِي هَذِهِ الثَّلَاثَةِ الْمَوَاطِنِ وَ آمَنَ رَوْعَتَهُ فَقَالَ: وَ سَلامٌ عَلَيْهِ يَوْمَ وُلِدَ وَ يَوْمَ يَمُوتُ وَ يَوْمَ يُبْعَثُ حَيًّا وَ قَدْ سَلَّمَ عِيسَى بْنُ مَرْيَمَ عَلَى نَفْسِهِ فِي هَذِهِ الثَّلَاثَةِ الْمَوَاطِنِ فَقَالَ: «وَ السَّلامُ عَلَيَّ يَوْمَ وُلِدْتُ وَ يَوْمَ أَمُوتُ وَ يَوْمَ أُبْعَثُ حَيًّا»
*Tafsīr Nūr al-Thaqalayn*, vol. 3, p. 327
In *ʿUyūn al-Akhbār*, with its own chain of transmission, it is narrated from Yāsir, the attendant, who said:
I heard Imam Abū al-Ḥasan al-Riḍā (peace be upon him) say:
“The most difficult and frightening moments a person faces are three:
“The day of birth, when he comes out of his mother’s womb and sees the world for the first time;
“the day of death, when he departs this world and encounters the Hereafter and its people;
“and the Day of Resurrection, when he rises from his grave and faces rulings and realities he had never seen in this world.
“Almighty God sent salām upon Yaḥyā ibn Zakariyyā in all three of these moments, bringing him comfort and easing his fear. He said:
‘Peace be upon him the day he was born, the day he dies, and the day he is raised to life.’
“ʿĪsā ibn Maryam, too, invoked peace upon himself in these same three moments, saying:
‘Peace be upon me the day I was born, the day I die, and the day I am raised to life.’”