Midrash su Ecclesiaste 7:20

Rabba b. b. Chana said: "When R. Eliezer became sick, his disciples came to make him a sick call, and he said to them, 'Great anger prevails in the world' (i.e., referring to himself) and they began to weep. R. Akiba, however, smiled. And to the question: 'Why are you smiling?' he said to them, 'Why are you weping?' They answered: 'Is it possible not to weep when we see the Holy Scroll is in such a painful distress?' Whereupon he remarked: 'And therefore I smile, for so long as I have seen our master's wine does not become sour, his flocks undamaged, his oil unspoiled, and his honey unfermented, I was afraid that perhaps he received all his reward in this world; now as I see him in pain, I rejoice.' 'Akiba,' said R. Eliezer to him, 'have I then failed to perform, or transgressed, anything of what the Torah says?' And he answered: 'You, master, yourself taught us (Ecc. 7, 20) For there is not a righteous man upon earth, that doeth good, and sinneth never."