(V.31:14).
a) See the footnote of (V.17:13).
b) Narrated ‘Âishah رضي الله عنها: (that she said), "O Allâh’s Messenger! We consider Jihâd as the best deed. Should we not fight in Allâh’s Cause?" He said, "The best Jihâd (for women) is Hajj-Mabrur [i.e. Hajj (pilgrimage to Makkah) which is performed according to the Prophet’s Sunnah (legal ways), and is accepted by Allâh]." (See Sahih Al-Bukhari, Vol. 3, Hadîth No.84." and Sahih Al-Bukhari, Vol. 4, Hadîth No.43).