He said :

Learn, for learning is protection. Seeking knowledge is worship, studying it is glorification (of Allah), looking for it is jihad, teaching it (to others) is alms, and giving it to those who are appropriate for it is proximity (to Allah). Knowledge is the signpost of the garden. It is an intimate in lonesomeness, a companion in exile, a friend in estrangement, a guide to ease, a help against affliction, adornment with friends, and a weapon against enemies. By it Allah promotes some people to make them Imams (leaders) for good. So, (people) follow their example and report their works. All wet and dry things, the whales and vermin of the see, and the animals and livestock of the land ask (Allah) to bless them.”

Whoever teaches a door of guidance, will have the same reward of those who put it into practice. Nothing of the rewards of those (who put guidance into practice) will be decreased. Whoever teaches a door of error, will have the same burdens of those who put in into effect. Nothing of the burdens of those (who put error into effect) will be decreased.”