Mishkat al-Masabih #240

‘Aisha said she heard God’s messenger say that God revealed to him, “ If anyone follows a path in search of knowledge, I shall make easy for him the road to paradise; and if I deprive anyone of his eyes, I shall guarantee paradise to him in return for them. Superiority in knowledge is better than superiority in worship, and the basis of the religion is abstinence.” Baihaqi transmitted it in Shu'ab al-iman.