Matt 8:4 (AKJV/PCE)
(8:4) And Jesus saith unto him, See thou tell no man; but go thy way, shew thyself to the priest, and offer the gift that Moses commanded, for a testimony unto them.
Mark 1:44 (AKJV/PCE)
(1:44) And saith unto him, See thou say nothing to any man: but go thy way, shew thyself to the priest, and offer for thy cleansing those things which Moses commanded, for a testimony unto them.
Luke 5:14 (AKJV/PCE)
(5:14) And he charged him to tell no man: but go, and shew thyself to the priest, and offer for thy cleansing, according as Moses commanded, for a testimony unto them.
See Leviticus 13-14 to see that Jesus was talking about.
Lev 14:4-7 (AKJV/PCE)
(14:4) Then shall the priest command to take for him that is to be cleansed two birds alive [and] clean, and cedar wood, and scarlet, and hyssop: (14:5) And the priest shall command that one of the birds be killed in an earthen vessel over running water: (14:6) As for the living bird, he shall take it, and the cedar wood, and the scarlet, and the hyssop, and shall dip them and the living bird in the blood of the bird [that was] killed over the running water: (14:7) And he shall sprinkle upon him that is to be cleansed from the leprosy seven times, and shall pronounce him clean, and shall let the living bird loose into the open field.