١ـ الْحُسَيْنُ بْنُ مُحَمَّدٍ الأشْعَرِيُّ عَنْ عَبْدِ الله بْنِ عَامِرٍ عَنْ عَلِيِّ بْنِ مَهْزِيَارَ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنِ الْحُسَيْنِ بْنِ عُثْمَانَ عَنِ ابْنِ مُسْكَانَ عَنْ زُرَارَةَ قَالَ قَالَ لِي أَ تَدْرِي لِمَ جُعِلَ الذِّرَاعُ وَالذِّرَاعَانِ قَالَ قُلْتُ لِمَ قَالَ لِمَكَانِ الْفَرِيضَةِ لَكَ أَنْ تَتَنَفَّلَ مِنْ زَوَالِ الشَّمْسِ إِلَى أَنْ يَبْلُغَ ذِرَاعاً فَإِذَا بَلَغَ ذِرَاعاً بَدَأْتَ بِالْفَرِيضَةِ وَتَرَكْتَ النَّافِلَةَ.
1. Al-Husayn ibn Muhammad al-Ash’ariy has narrated from ‘Abd Allah ibn ‘Amir from Ali ibn Mahziyar from Fadalah ibn Ayyub from al-Husayn ibn ‘Uthman from ibn Muskan from Zurarah who has said the following: “He (the Imam) , once said to me, ‘Do you know why one and two yards are set?’ I (the narrator) said, ‘Why are they set?’ He (the Imam) said, ‘It is because of obligatory Salah (prayer). You can perform optional Salah (prayer) soon after the sun declines (to the west at noontime) until it become one yard, but if you begin the obligatory one, you do not perform optional Salah (prayer).”’ 