Wathila b. al-Asqa‘ reported God’s messenger as saying, “He who seeks knowledge and attains it will have a double portion of reward,
but if he does not attain it he will have a single portion of reward."
Darimi transmitted it.
Ikrima reported Ibn ‘Abbas as saying, “Talk to the people once
every Friday, but if you object, then twice, and if you want more, then
three times, but do not weary the people with this Qur’an. And do not
let me find you coming to the people when they are talking about their
concerns, interrupting them in their talk by addressing them, and so
wearying them. Keep silent, and when they request you, talk to them
at a time when they want it. Look out for rhymed prose in supplications and avoid it, for I know that God’s messenger and his companions
did not use it.” Bukhari transmitted it.
Abu Huraira reported God’s messenger as saying, “Among the
actions and good deeds for which a believer will continue to receive reward after his death are knowledge which he taught and spread, a good
son whom he left behind, or a copy of the Qur'an which he left as a
legacy, or a mosque which he built, or a house which he built for the
traveller, or a stream which he caused to flow, or a sadaqa which he
gave from his property when he was alive and well, for which he will
continue to receive reward after his death.” Ibn Majah transmitted it,
and also Baihaqi in Shu'ab al-iman.
‘Ali reported God’s messenger as saying, “Good is the man learned
in religion who, if people have need of him benefits them, but who, if
they ignore him enriches himself.”* Razin transmitted it.
*i.e. with religious exercises and study.