Jaabir ibn Samurah radiyallahu anhu says, The calf of the leg of Rasoolullah sallallahu alaihe wasallam was slightly thin. His laugh was only that of a smile. Whenever I visited Rasoolullah sallallahu alaihe wasallam, I thought he used kuhl on his eyes. Whereas he had not at that time used kuhl (DE)
English reference (DE): Book 34, Hadith 216 (DE)
Arabic reference (DE): Book 35, Hadith 226 (DE)