“Narrated Abu Musa: A man came to the Prophet and asked, "A man fights for war booty; another fights for fame and a third fights for showing off; which of them fights in Allah's Cause?" The Prophet said, "He who fights that Allah's Word (i. e. Islam) should be superior, fights in Allah's Cause."”

Chain of transmission: Sulayman ibn Harb ⟶ Shu'ba ⟶ Amr ⟶ Abu Wael ⟶ Abu Musa note: Note 1: the translation was published by the Islamic University of Madinah and many have associated the university with the Wahhabi Salafi ideology, and have stated it has exported Salafi-inclined theologians around the world. The chain of transmission are not present in the translation and the content inside parentheses are commentaries by the translator not present in the Arabic text. note: Note 2: "Allah's Word" (Arabic: كَلِمَةُ اللَّهِ; kalimat Allāh) could refer to the concept of the logos. The word "aleulya" (الْعُلْيَا) can also be translated as "highest". note: Sunni Hadith
Original: (ar) حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا شُعْبَةُ، عَنْ عَمْرٍو، عَنْ أَبِي وَائِلٍ، عَنْ أَبِي مُوسَى ـ رضى الله عنه ـ قَالَ جَاءَ رَجُلٌ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ الرَّجُلُ يُقَاتِلُ لِلْمَغْنَمِ، وَالرَّجُلُ يُقَاتِلُ لِلذِّكْرِ، وَالرَّجُلُ يُقَاتِلُ لِيُرَى مَكَانُهُ، فَمَنْ فِي سَبِيلِ اللَّهِ قَالَ ‏ "‏ مَنْ قَاتَلَ لِتَكُونَ كَلِمَةُ اللَّهِ هِيَ الْعُلْيَا فَهُوَ فِي سَبِيلِ اللَّهِ ‏"‏‏.‏
Source: Sahih al-Bukhari, compiled by Muhammad al-Bukhari. Translated into English by Muhammad Muhsin Khan in The Translation of the Meanings Of Sahih Al-Bukhari, Volume 4, Book 52, Number 65 https://archive.org/stream/nabeel_Vol1_201703/Vol%204#page/n120/mode/1up, 1971. The Arabic text used for this work is from Fath Al-Bari, a multi-volume commentary on the Sunni hadith collection Sahih al-Bukhari, composed by Ibn Hajar al-'Asqalani in the 15th century, published by the Egyptian Press of Mustafa Al-Babi Al-Halabi in 1959.