Answer
Salam Dear Questioner,
Thank you for your question and for contacting Ask About Islam
After consulting specialized scholars in this specific topic, I have concluded the following:
A Muslim is recommended to make dua (supplication) in good times and situations where dua will be mostly answered by Almighty Allah. Among the good times for dua are in the sujud (prostration) as you have mentioned, before the Fajr time, when it rains, at the time of breaking one’s fasting, etc.
A Muslim may make dua in his or her sujud by saying words, phrases, or sentences from the Quranic verses that imply dua. For instance, one may say in his dua the following Quranic supplications:
{Our Lord! Condemn us not if we forget, or miss the mark! Our Lord! Lay not on us such a burden as Thou didst lay on those before us! Our Lord! Impose not on us that which we have not the strength to bear! Pardon us, absolve us and have mercy on us, Thou, our Protector, and give us victory over the disbelieving folk.} (Al-Baqarah 2: 286)
{Our Lord! Vouchsafe us comfort of our wives and of our offspring, and make us patterns for (all) those who ward off (evil).} (Al-Furqan 25: 74)
It is noteworthy that answering one’s dua depends on many factors such as one’s closeness to Allah, earning halal (lawful) livelihood, choosing good times for making dua such as dua in the sujud and before the Fajr time, and adhering to good manners of making dua such as starting one’s dua with praising Allah and sending peace and blessings on the Prophet (peace be on him) and closing one’s dua with the same.
Moreover, you need to know that the response to one’s dua may take one of the following forms:
1. To get what you ask for,
2. To be protected against an evil that would befall you if you don’t make such dua, or
3. To be delayed to the Hereafter when you receive rewards from Allah for your dua.
So, never lose hoping in gaining Allah’s blessings and favors through making dua, which is a form of worship in itself.
Insha’Allah, you may get what you ask for, you may be protected against some evils, or/and you may get the reward for your dua in the Hereafter.
May Allah accept your good deeds! And Allah Almighty knows best.
I hope this helps answer your question.
Salam and please keep in touch.