1047. hadíth
وَ سَأَلَ سَهْلُ بْنُ اَلْيَسَعِ أَبَا اَلْحَسَنِ اَلْأَوَّلَ عَلَيْهِ اَلسَّلاَمُ: عَنِ اَلرَّجُلِ يُصَلِّي اَلنَّافِلَةَ قَاعِداً وَ لَيْسَ بِهِ عِلَّةٌ فِي سَفَرٍ أَوْ حَضَرٍ فَقَالَ «لاَ بَأْسَ بِهِ.
Sahl ibn al-Yas'a asked Abu Al-Hasan al-Awwal (a.s) about a man who prays a voluntary prayer sitting while he does not have any illness, whether in travel or while at home. Imam (a.s) said: "There is no harm in that”.