Musnad Ahmad 785:19

Rawh narrated to us, Zakariya ibn Ishaq narrated to us, Ibrahim ibn Maysarah narrated to us, that he heard ‘Amr ibn al-Sharid narrating from his father, that the Prophet (peace and blessings of Allah be upon him) followed a man from Thaqif, until he trotted behind him, until he took hold of his garment, and said: "Raise your lower garment." The man uncovered his knees and said: "O Messenger of Allah, I am knock-kneed, and my knees knock together." The Messenger of Allah (peace and blessings of Allah be upon him) said: "All of Allah’s creation is good." He said: And that man was never seen except with his lower garment at the midpoints of his shins until he died.