Maimonides — "For if a man were to study the Torah with a view to obtaining reward, and keepin…"
For if a man were to study the Torah with a view to obtaining reward, and keeping the commandments in order to escape punishment, he would be studying not for the sake of the Torah, but for the sake of reward; and since reward is a thing of no consequence, he would be studying for the sake of something of no consequence, and would thus be learning nothing at all.
