وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَزِيدَ بْنِ زِيَادٍ، عَنْ مُحَمَّدِ بْنِ كَعْبٍ الْقُرَظِيِّ، قَالَ قَالَ مُعَاوِيَةُ بْنُ أَبِي سُفْيَانَ وَهُوَ عَلَى الْمِنْبَرِ أَيُّهَا النَّاسُ إِنَّهُ لاَ مَانِعَ لِمَا أَعْطَى اللَّهُ وَلاَ مُعْطِيَ لِمَا مَنَعَ اللَّهُ وَلاَ يَنْفَعُ ذَا الْجَدِّ مِنْهُ الْجَدُّ مَنْ يُرِدِ اللَّهُ بِهِ خَيْرًا يُفَقِّهْهُ فِي الدِّينِ ‏.‏ ثُمَّ قَالَ مُعَاوِيَةُ سَمِعْتُ هَؤُلاَءِ الْكَلِمَاتِ مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم عَلَى هَذِهِ الأَعْوَادِ ‏.‏

Yahya related to me from Malik from Yazid ibn Ziyad that Muhammadibn Kab al-Quradhi said, ''Muawiya ibn Abi Sufyan said from themimbar, 'O people! Nothing keeps away what Allah gives and nothinggives what Allah keeps away. The earnestness of the earnest one doesnot profit him. When Allah desires good for him, he gives himunderstanding in the deen.' Then Muawiya said, 'I heard these wordsfrom the Messenger of Allah, may Allah bless him and grant him peace,on these blocks of wood.' " Translation Not Available

Book Ref: Muwatta Imam Malik Book 46 Hadith 1633
Web Ref:  Muwatta Imam Malik Book 46 Hadith 8