2. Yes. The sunnah (what the Prophet Muhammad
(P.b.u.h) said, did, or approved of) is the second
source in Islam. The sunnah is comprised of
hadeeths, which are reliably transmitted reports by
the Prophet Muhammad’s (P.b.u.h) companions of
what he said, did, or approved of. Belief in the
sunnah is a basic Islamic belief.