مختصر صحيح بخاري
Mukhtasar Sahih Bukhari
Book of Adhan (Call to Prayer)
Shortening and perfecting prayer is Sunnah.
Sayyiduna Anas (may Allah be pleased with him) says that the Noble Prophet (peace and blessings be upon him) used to perform a short prayer and would perform it perfectly (completely).
تخریج الحدیث:
