Allah, the Exalted, says:
"And your Rubb(Lord) said: `Invoke Me, [i.e., believe in My Oneness (Islamic Monotheism)] (and ask Me for anything) I will respond to your (invocation).''' (40:60)
"Invoke your Rubb(Lord) with humility and in secret. He likes not the aggressors.'' (7:55)
"And when My slaves ask you (O Muhammad (sallallaahu ’alayhi wa sallam)) concerning Me, then (answer them), I am indeed near (to them by My Knowledge). I respond to the invocations of the supplicant when he calls on Me (without any mediator or intercessor).'' (2:186)
"Is not He (better than your gods) Who responds to the distressed one, when he calls on Him, and Who removes the evil?'' (27:62)
"And your Rubb(Lord) said: `Invoke Me, [i.e., believe in My Oneness (Islamic Monotheism)] (and ask Me for anything) I will respond to your (invocation).''' (40:60)
"Invoke your Rubb(Lord) with humility and in secret. He likes not the aggressors.'' (7:55)
"And when My slaves ask you (O Muhammad (sallallaahu ’alayhi wa sallam)) concerning Me, then (answer them), I am indeed near (to them by My Knowledge). I respond to the invocations of the supplicant when he calls on Me (without any mediator or intercessor).'' (2:186)
"Is not He (better than your gods) Who responds to the distressed one, when he calls on Him, and Who removes the evil?'' (27:62)