(V.22:27).
a) Narrated Abu Hurairah رضي الله عنه: Allâh’s Messenger صلى الله عليه وسلم said, "Whoever performs Hajj to this House (Ka‘bah ) and does not approach his wife for sexual relations nor commits sins (while performing Hajj), he will come out as sinless as a newly-born child (just delivered by his mother)." (Sahih Al-Bukhari, Vol.3, Hadith No.45).
b) See the footnote of (V.2:196).
(V.22:29) See the footnote of (V.2:128).
(V.22:30) See the footnote of (V.5:32).