A little trad text help, please.

I have a half remembered notion that in one (or perhaps more) trad texts, there is mention of the Sun in the 5th giving rise to a ruler or a king.

Does anyone recall such a reference, and can direct me to where it was?

Thanks!

uh i've searched in a few traditional texts & the only thing i could find was about the 10th house, not the 5th:

''Make Saturn and Sun significators of kings and princes, with the planet, and planets of the tenth; but their helpers take from the eleventh, and the assistants of vulgar persons from the second house.''

from the centiloquium of hermes: http://www.skyscript.co.uk/centiloquium2.html

i'm afraid this wasn't what you were looking for, though.