When the Prophet (ﷺ) Sallallahu Alaihi wa Sallam performed the Subh/Fajr (morning prayer), he would supplicate –
“Allahumma inni as’aluka ‘ilman nafi’an, wa rizqan tayyiban, wa ‘amalan mutaqabbalan.” English Translation: “O Allah, I ask You for beneficial knowledge, goodly provision and acceptable deeds.”
Narrated from: Umm Salamah (Radi Allahu Anhu)
Grade : Sahih (Darussalam) and also classed as Sahih by al-Albaani in Saheeh Ibn Maajah.
Reference: English Reference: Vol. 1, Book 5, Hadith 925; Arabic reference: Book 5, Hadith 978. Weblink: https://sunnah.com/urn/1282730
Prophet (ﷺ) Sallallahu Alaihi wa Sallam Said:
“Ask Allah for beneficial knowledge and seek refuge with Allah from knowledge that is of no benefit.”
Narrated from Jabir (Radhi Allaahu anha)
Grade: Hasan (Darussalam)
Reference: Sunan Ibn Majah 3843; In-book reference: Book 34, Hadith 17; English translation: Vol. 5, Book 34, Hadith 3843
Weblink: https://sunnah.com/ibnmajah/34/17
Muhsina Organization 
Could you please tell me what is the arabic translation of “beneficial knowledge”. thanks.
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Assalamu Alaikum, Dear Brother
Thank you for your question. In this particular hadith, the words “عِلْمًا نَافِعًا” are referring to what has been translated as “beneficial knowledge”. But you can ask an expert Arabic speaker to learn about it properly.
May Allaah reward you with goodness. Ameen.
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