Hebrews 2:17:

Wherefore in all things it behoved him to be made like unto his brethren, that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people.

See also:

God’s Mercy and Compassion
All About Healing Services
Objection: Jesus Healed and Did Miracles to Authenticate His Messiahship
Objection: We Cannot Demand Healing from God Because God Is Sovereign
Notes on Matthew 9:27-30