Isa 35:5-6, Ps 103:3, Mt 4:23-24, Lk 7:21-22, Acts 2:22

In the Old Testament, it was foretold that Christ would come and bring about a work of healing. (Isa 35:5-6, Ps 103:3)

Isa 35:5 Then the eyes of the blind shall be opened, and the ears of the deaf shall be unstopped. 6 Then shall the lame man leap as an hart, and the tongue of the dumb sing: for in the wilderness shall waters break out, and streams in the desert.

Ps 103:3 Who forgiveth all thine iniquities; who healeth all thy diseases;

Jesus performed the healing work of Christ prophesied in the Old Testament. (Mt 4:23-24, Mt 15:29-31)

Mt 4:23 And Jesus went about all Galilee, teaching in their synagogues, and preaching the gospel of the kingdom, and healing all manner of sickness and all manner of disease among the people. 24 And his fame went throughout all Syria: and they brought unto him all sick people that were taken with divers diseases and torments, and those which were possessed with devils, and those which were lunatick, and those that had the palsy; and he healed them.

Mt 15:29 And Jesus departed from thence, and came nigh unto the sea of Galilee; and went up into a mountain, and sat down there. 30 And great multitudes came unto him, having with them those that were lame, blind, dumb, maimed, and many others, and cast them down at Jesus' feet; and he healed them: 31 Insomuch that the multitude wondered, when they saw the dumb to speak, the maimed to be whole, the lame to walk, and the blind to see: and they glorified the God of Israel.

Jesus explained that his healing ministry was to testify that he was the Christ. (Lk 7:21-22)

Lk 7:21 And in that same hour he cured many of their infirmities and plagues, and of evil spirits; and unto many that were blind he gave sight. 22 Then Jesus answering said unto them, Go your way, and tell John what things ye have seen and heard; how that the blind see, the lame walk, the lepers are cleansed, the deaf hear, the dead are raised, to the poor the gospel is preached.

God testified that Jesus was the Christ by showing great power, wonders, and signs through Jesus. (Acts 2:22)

Acts 2:22 Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know: