Does God accept the prayers of those who believe and do good deeds (according to His instructions)?
Does God answer the prayer of each supplicant who calls on Him solely?
Verse 26 of Chapter 42:
And He accepts the prayers of those who
accept faith and do good deeds, and gives them a greater reward by His
munificence; and for the disbelievers is a severe punishment.
Kaf Ha Ya Ain Sad. Here is an accounts of the mercy your Lord showed to His servant Zachariah. when he invoked his Lord in an under tone. He prayed, “O my Lord! My very bones have become rotten, and my head is glistening with age. My Lord! I have never been disappointed in my prayer to Thee.
Verse 186 of Chapter 2:
And when My servants ask you (O Muhammad 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). So let them obey Me and believe in Me, so that they may be led aright.
Verse 14 of Chapter 13:
To invoke Him alone is the right thing. As regards the other deities whom they invoke apart from Him, they cannot give any answer to their prayers. It is as if a man were to stretch his hands towards water and ask it to come to his mouth, when it cannot reach his mouth in this way; likewise the prayers of the disbelievers are nothing but aimless efforts.