Sahih Muslim , Book 28, Hadith 5607 (USC-MSA) ⓘ
Abu Huraira reported Allah's Apostle as saying: The truest couplet recited by a poet is: "Behold! apart from Allah everything is vain," and he made no addition to it.
وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ عَبْدِ الْمَلِكِ بْنِ، عُمَيْرٍ عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " أَصْدَقُ بَيْتٍ قَالَتْهُ الشُّعَرَاءُ أَلاَ كُلُّ شَىْءٍ مَا خَلاَ اللَّهَ بَاطِلٌ " .
also referenced under: Book 41, Hadith 6 (In-Book) & Hadith 2256 (Reference)