John Gill Commentary Luke 5:13

"And he stretched forth his hand, and touched him, saying, I will; be thou made clean. And straightway the leprosy departed from him." — Luke 5:13 (ASV)

And he put forth his hand and touched him
Having compassion on him, and commiserating his sad case:

saying, I will, be you clean; and immediately the leprosy departed
from him ;
(See Gill on Matthew 8:3).