1 Timothy 4
Paul counseled Timothy in his calling to not only be an example of the believers, but also -
"...give attendance to reading, to exhortation, to doctrine.
14 Neglect not the gift that is in thee, which was given thee by prophecy, with the laying on of the hands of the presbytery.
15 Meditate upon these things; give thyself wholly to them; that thy profiting may appear to all.
16 Take heed unto thyself, and unto the doctrine..." (1 Timothy 4:13–16)
Obviously, teaching doctrine is a critical component of leadership.