Is this Hadith correct:
“If someone reads the following du’a three times, then his shirk related sins will be forgiven,
Allahumma ini aujubika un ushrika bika wa ana a’lamu wa astaghfiruka lima la a’lamu.”
I managed to locate the following Hadith that is closest to the wordings of the du’a in question:
Sayyiduna Abu Bakr (radiyallahu’anhu) reports that Rasulullah (sallallahu’alayhi wasallam) said:
‘Shirk (polytheism) is more subtle than the movements of an ant. Should I not show you’ll [a du’a] that will remove minor and major forms of polytheism?
Recite: Allahumma inni a’udhu bika an ushrika bika wa ana a’lam, wa astaghfiruka lima la a’lam.
O Allah, I seek refuge in You from ascribing any partner to you knowingly. I also seek your protection from unknowingly [ascribing partners to you].
(Musnad Abi Ya’la, Hadith: 55-56)
Note 1: There are other versions as well that support this.
Refer: Musannaf Ibn Abi Shaybah, Hadith: 30163, Targhib, Hadith: 57 and Majma’uz Zawaid, vol. 10 pg. 223-224.
Note 2: The narrations that I have referred to, do not mention that ‘shirk related sins will be forgiven’ as stated in your query. Rather, they state that one who recites this [in some narrations: thrice] will be protected from both forms of Shirk.
And Allah Ta’ala Knows best,
Answered by: Moulana Muhammad Abasoomar
Checked by: Moulana Haroon Abasoomar