The truest word spoken by an Arab (pre-Islamic) in poetry is this verse of Labid: "Behold! apart from Allah everything is vain."
Sahih Muslim Book 41, Hadith 3
← Previous Hadith "He (that is Umayya b. Abu Salt) was about to become a Muslim", and in the hadith transmitted on the authority of Ibn Mahdi (the words are) "He was almost a Muslim in his poetry."

Sahih Muslim Book 41, Hadith 2 Next Hadith → The truest word uttered by a poet is this verse of Labid: "Behold! apart from Allah everything is vain," and Umayya b. Abu Salt was almost a Muslim.

Sahih Muslim Book 41, Hadith 4