Allah the most compassionate says in the Holy Quran, “Call on Me. I will answer your prayer, but those who are too arrogant to serve Me will surely find themselves humiliated in Hell” (40:60).

Allah the Exalted, has said: “And your Lord says: Pray unto me: and I will hear your prayer” (Quran 40:60),

“Call upon your Lord humbly and in secret” (Quran 7:55),

“When My servants question thee concerning Me, I am indeed close (to them): I listen to the prayer of every suppliant when he calleth on Me” (Quran 2:186),

“Is not He (best) who listens to the (soul) distressed when it calls on Him, and who relieves its suffering.” (Quran 27:62)

Dua’s are never wasted
Aisha radhiallaahu anha said, “No believer makes Dua and it is wasted. Either it is granted here in this world or deposited for him in the Hereafter as long as he does not get frustrated.”

Allah’s anger at those who don’t make dua
In fact, it is even wrong to never make Dua, “Whosoever does not supplicate to Allah, He will be angry with Him.” [Saheeh Jaami`as-Sagheer #2414]

Dua is a weapon for the believers
Rasullullah is reported to have said, “Dua is the weapon of a Muslim”.

Dua for ones brother in his absence
“The supplication that gets the quickest answer is the one made by one Muslim for another in his absence.” [Abu Daw’ud and Tirmidhi]

So let us build a close relationship with Allah by making much dua to him. He loves it when his slave calls upon him and it angers him if his slave does not call upon him.

Let us have full hope that our dua’s will be accepted and if you think they won’t they know Allah is keeping the rewards for you in the hereafter and those rewards are so great that one would wish that none of their duas were excepted in this world just so that one can gain all the rewards for their duas in the next world.