It is narrated from Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The virtue of knowledge is dearer to me than the virtue of worship" (like the previous hadith). This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it. Al-Hasan bin Ali bin Affan is trustworthy and he stated the chain correctly, whereas Bakr bin Bakkar made it vague (left a narrator unnamed).