Effects of prayer, supplication, Dua and curse of Mother

The Messenger of Allah (salAllahu alayhi wasallam) said,
"Three supplications will not be rejected (by Allah Subhaan wa Ta'ala), the supplication of the parent for his child, the supplication of the o*ne who is fasting, and the supplication of the traveler." [al-Bayhaqi, Tirmidhi - Saheeh]

“My Lord! Bestow on them Your Mercy as they did bring me up when I was small.” [Surah Al-Isra, Verse 24]

Imam of Ka'bah: Beautiful Story

Shaykh Al-Kalbaani, former Imam of the Ka'bah, at a conference in London has told this story:

When he was young, he was a very naughty boy. He would make his mother angry. But his mother, Allah bless her, was a very righteous woman and she knew the power of Dua.

She made it her habit that, in her anger at him, she would say this Dua: "O Allah guide YOU! And make you the IMAM of the Ka'bah!"

Imam Al-Kalbani tells us, "so Allah answered her dua and I went on to become the Imam of the Ka'bah!"

Shaykh Adil Kalbani is black, and the son of a poor immigrant from the Persian Gulf. In an interview with NYTimes, Shaykh Kalbani said,

"Leading prayers at the Grand Mosque is an extraordinary honor, usually reserved for pure-blooded Arabs from the Saudi heartland."

He was taken aback when he came to know that King Abdullah had chosen him as the first black Imaam of Masjid al-Haram (in recent times), he added. Masha Allah!

Another story:

Its said of the present Imam of Haramain Shareefain, Hadrath Qari Abdul Rahman Al-Sudais, an account of his life which I came to know from respectable sources that whenever the mother of Imam Sudais used to get angry, she would curse him like: 

“May Allah make you the Imam of the Haramain !!”
Allahu Akbar! Such a strange curse it is – that which unarguably had glad tidings for the young Imam. This is in effect a result of the teachings of Islam, a result of growing up in a religious household. Just see what happened thereafter, Allah subhanahu wa ta’ala accepted her prayers, made Qari Abdul rahman Al-Sudais the Imam of Kaaba and spread his name and fame across the whole world.

From the above story I’d like to bring to your attention that mother’s should never ever curse their children, and if at all they get angry at their kids – they should make such a prayer…that which is beneficial for their kids, the kind of prayer that the mother of Imam Abdul Rahman Al-Sudais used to do.
Source: واقعات پڑہے اور عبرت لجے                  Mother's curse, supplicarion, prayer and Dua is accepted and answered