Who knelt before Jesus and begged, "If You are willing, You can make me clean"?

Answer: A leper

Moved with compassion, Jesus touched the leper and said, "I am willing. Be clean!" and the leprosy left him at once.

“Then a leper came to Jesus, begging on his knees: “If You are willing, You can make me clean.” Moved with compassion, Jesus reached out His hand and touched the man. “I am willing,” He said. “Be clean!” And immediately the leprosy left him, and the man was cleansed.”— Mark 1:40-42 (BSB)