Ghafir 40:50

Qaloo awa lam taku ta/teekumrusulukum bilbayyinati qaloo bala qaloofadAAoo wama duAAao alkafireena illafee dalal

They will say, "Did there not come to you your messengers with clear proofs?" They will say, "Yes." They will reply, "Then supplicate [yourselves], but the supplication of the disbelievers is not except in error [i.e., futility]."

They will say, “Had your messengers not been coming to you with open signs?” They will say, “Of course, (they had come).” They (the keepers) will say, “Then, keep praying” - but praying of disbelievers (in the Hereafter) is only in vain.