It is narrated from Sayyiduna Ja'dah al-Jushami (may Allah be pleased with him) that he said: I saw the Prophet (peace and blessings be upon him) pointing with his blessed hand toward the belly of a fat man and saying: "If this (fat and flesh) were somewhere other than here (that is, spent in toil in the path of Allah), it would have been better for you." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.