Hasan al-Basri (may Allah have mercy on him) narrates: Uthman bin Abi al-As (may Allah be pleased with him) had a house which he had set apart for narrating hadith, and we used to come to him there. He used to say: "An hour for this world and an hour for the Hereafter, and Allah knows best which of the two hours prevails."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8299