from his father, from the Prophet (ﷺ) who said: "The thigh is 'Awrah."
Jami` at-Tirmidhi Book 43, Hadith 69
← Previous Hadith about his grandfather Jarhad, he said: "The Prophet (ﷺ) passed by Jarhad in the Masjid and his thigh was exposed, so he said: 'Indeed the thigh is 'Awrah.'"

Jami` at-Tirmidhi Book 43, Hadith 68 Next Hadith → that the Prophet (ﷺ) said: "The thigh is 'Awrah."

Jami` at-Tirmidhi Book 43, Hadith 70