And how many of my stumblings hast Thou protected, how many of my detestable acts has Thou averted, and how many of my undeserving praises hast Thou spread abroad!

Dua Kumayl / The Supplication of Kumayl - Qul

I Instead of encouraging them to do good things and helping them along this path, their very own soul has deceived them. Since we do not know what is meant by these "good things" which will make God fully satisfied with us, we should not miss any opportunity to do a good thing since that particular good action may be in reality the one which pleases God. So do not belittle any of His servants since that very servant may be His special friend while you do not realise. The recitation of this du'a has been especially recommended on the night preceding Friday and in the middle of the month of Sha'ban.Imam 'Ali (a) said, "Whosoever keeps awake in devoutness on this night (15th Sha'ban) and recites the du'a of Prophet Khidr, undoubtedly that person's supplication will be responded to and granted.

Dua Tawassul- Duas.org Dua Tawassul- Duas.org

As we do not know what kind of sins these are, we should be cautious about every individual sin because that very sin which we commit may be exactly the one which hinders our supplication. However, we must be very cautious and careful and not take any risk since there are some sins that cause one's faith to be lost and one's du'as to be unaccepted. How then can I bear the retributions and the punishments of the hereafter which are enormous and of intensive sufferings, of prolonged period and perpetual duration, and which shall never be alleviated for those who deserve the same as those retributions will be the result of Thy wrath; and Thy punishment which neither the heavens nor the earth can withstand and bear! According to Allama Majlisi, Kumayl had attended an assembly in the Mosque at Basra which was addressed by Imam Ali in which the night of the 15th of Shaban was mentioned.

I definitely conclude that had Thou not ordained punishment for those who disbelieved in Thee, and had Thou not decreed Thy enemies to remain in hell, Thou would have made hell cool and peaceful and there would never have been an abode or place for anyone in it. There is a narration from the Holy Prophet (s) to the effect that once he (s) asked God for he himself to be in charge of his nation's actions on the Day of Judgment so that no one else would be informed of their actions. And how can the fire cause him suffering when he hopes for Thy grace and mercy and how can its roaring flames char him when Thou hearest his voice and sees his plight? Then how could he remain in torments when he hopefully relies upon Thy past forbearance, compassion and mercy? Therefore, do not belittle any act of disobedience as that very act may cause His dissatisfaction while you do not realise.

Dua Kumayl Duas.org Dua Kumayl Duas.org

May the blessing and peace of Allah be upon you, O' the trustee of Al-Hasan, the good ambassador, O' the leader of our time, who shall rise for truth, the awaiting Al-Mahdi, O' our chief and master, we concentrated, and seeking for intercession and means to Allah through you, and we have presented our demands in this world and in the world Hereafter before you, O' the prominent one before Allah, intercede for us before Allah. a) When we do any action there are certain witnesses to it who will give testimony on the Day of Judgment. That is not the concept (held by us) of Thee nor has Thy grace such a reputation nor does it resemble that which Thou hast awarded by Thy kindness and generosity to those who believe in Thy unity. May Allah's blessing and peace be upon both of you, O' the father of Al-Hasan and the father of Muhammad, O' Ali son of Muhammad, O' Al-Naqi Al-Hadi and O' Al-Hasan son of Ali, O'Al-Zaki Al-Askari,O' the sons of the Messenger of Allah, O' the sons of the commander of the faithful, O' Allah's proves on the whole of His creations, O' our chiefs and masters, we have concentrated, seeking for intercession and means to Allah through both of you, and we have presented our demands in this world and in the world Hereafter before both of you, O' the prominent ones before Allah, intercede for us before Allah. Leaving apart all these things, Khwaja could find out, using geomancy, the sheep which was kept in the house of Ibn e Hajib’s host, needless of keeping the condition of preventing the change in its weight.Which Thou in Thy mercy hast kept secret and through Thy kindness unexposed and I pray to Thee to make my share plentiful in all the good that Thou dost bestow; in all the favours that Thou dost grant; and in all the virtues that Thou dost allow to be known everywhere; and in all the sustenance and livelihood that Thou dost expand and in respect of all the sins that Thou dost forgive and the wrongs that Thou dost cover up O' Lord!

Dua Kumayl - Duas.org

According to this ayah, God has made it incumbent upon Himself to accept the repentance of those who do some wrongdoings out of ignorance and then, before they die, ask for forgiveness.

According to Allama Majlisi (on whom be Allah's Mercy) Kumayl had attended an assembly in the Mosque at Basra which was addressed by Imam Ali in the course of which the night of the 15th of Shaban was mentioned.