Pirkei Avot §avot_01_13: He [also] used to say: one who makes his name great causes his name to be des...

He [also] used to say: one who makes his name great causes his name to be destroyed; one who does not add [to his knowledge] causes [it] to cease; one who does not study [the Torah] deserves death; one who makes [unworthy] use of the crown [of learning] shall pass away.