Al-'Ankabut 29:6

Waman jahada fa-innama yujahidulinafsihi inna Allaha laghaniyyun AAani alAAalameen

And whoever strives only strives for [the benefit of] himself. Indeed, Allāh is Free from need of the worlds.

Whoever strives, strives for his own benefit. Surely Allah is independent of all the worlds.