مشكوة المصابيح
Mishkat al-Masabih
كتاب الصلاة
The Book of Prayer
(بَيَانُ صَلَاةِ النَّفْلِ فِي السَّفَرِ)
(Explanation of Nafl prayers during travel)
Hadith 1353
وَعَنْ نَافِعٍ قَالَ: إِنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ كَانَ يَرَى ابْنَهُ عُبَيْدَ اللَّهِ يَتَنَفَّلُ فِي السَّفَرِ فَلَا يُنْكِرُ عَلَيْهِ. رَوَاهُ مَالِكٌ
Nafi' said that ‘Abdallah b. ‘Umar used to see his son ‘Ubaidallah saying supererogatory prayers while on a journey, and did not express disapproval. Malik transmitted it.
