Answered by Shaykh Yusuf Weltch
Does a mispronunciation of the greeting of peace (as-salamu ‘alaikum) require prostrations of forgetfulness?
In the Name of Allah, the Most Merciful and Compassionate.
Prostrations of forgetfulness are only required when one unintentionally or accidentally leaves any necessary action. [Maydani, al-Lubab fi Sharh al-Kitab]
Mispronouncing the Salam does not fall under this category and thus does not require prostrations of forgetfulness.
Hope this helps
Allah knows best
[Shaykh] Yusuf Weltch
Checked and Approved by Shaykh Faraz Rabbani
Shaykh Yusuf Weltch teaches Arabic, Islamic law, and spirituality. After accepting Islam in 2008, he completed four years at the Darul Uloom seminary in New York, where he studied Arabic and the traditional sciences.
He then traveled to Tarim, Yemen, where he studied for three years in Dar al-Mustafa under some of the most outstanding scholars of our time, including Habib Umar Bin Hafiz, Habib Kadhim al-Saqqaf, and Shaykh Umar al-Khatib.
In Tarim, Shaykh Yusuf completed the memorization of the Quran and studied beliefs, legal methodology, hadith methodology, Quranic exegesis, Islamic history, and several texts on spirituality. He joined the SeekersGuidance faculty in the summer of 2019.