It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he said: "Quraysh said to the Jews: 'Give us something to ask this man (the Prophet, peace and blessings be upon him) about.' They said: 'Ask him about the soul (ruh).' So this verse was revealed: 'And they ask you about the soul. Say: The soul is of the command of my Lord, and you have not been given of knowledge except a little' [Surah al-Isra: 85] . The Jews (on hearing this) said: 'We are not such as have been given only a little knowledge; we have been given the Torah, in which is the ruling of Allah, and whoever has been given the Torah has been given a great deal of good.' At this, this verse was revealed: 'Say: If the sea were ink for the words of my Lord, the sea would be exhausted before the words of my Lord were exhausted, even if We brought the like of it as a supplement' [Surah al-Kahf: 109] ." The chain of this hadith is sahih (authentic), but the two Shaykhs (Bukhari and Muslim) did not record it.