Sahih Bukhari
Prophetic Commentary on the Quran (Tafseer of the Prophet (PBUH))
Volume: 006 / Book Number: 060 / Hadith Number: 195
Narrated 'Abdullah bin Ka'b:
I heard Ka'b bin Malik at the time he remained behind and did not join (the battle of) Tabuk, saying, "By Allah, no blessing has Allah bestowed upon me, besides my guidance to Islam, better than that of helping me speak the truth to Allah's Apostle otherwise I would have told the Prophet a lie and would have been ruined like those who had told a lie when the Divine Inspiration was revealed:-- "They will swear by Allah to you (Muslims) when you return to them.. the rebellious people." (9.95-96)