Mark 9:17
And one of the multitude answered and said, Master, I have brought unto thee my son, which hath a dumb spirit;
Cross-reference
Mark 9:25 later in the same story reveals the spirit was also deaf — Jesus commands the 'mute and deaf spirit' out.
Mark 7:25 parallels this father's plea — a parent brings a child tormented by an unclean spirit to Jesus for healing.
Mark 5:23 shows Jairus begging Jesus to heal his daughter—parallels the father here bringing his son for deliverance from a spirit.
Matthew 17:15 is the parallel account of the same healing — it adds that the boy was epileptic and suffered falls into fire and water.
Luke 9:38 is the parallel account — it adds that the boy was the man's only child, deepening the father's desperation.
Isaiah 35:6 prophesies that the mute will shout for joy — this healing of a mute boy fulfills that messianic promise.
Matthew 9:32 also describes a mute demon-oppressed man brought to Jesus — another instance of demonic muteness.
Matthew 12:22 describes another mute man healed by Jesus — a demon-oppressed man who was both blind and mute, showing a similar deliverance.
Matthew 15:22 tells of a mother begging Jesus to heal her demon-possessed daughter — similar parental plea for a child's deliverance.
Luke 11:14 also recounts Jesus casting out a mute demon — another instance of demonic muteness being healed.
John 4:47 describes another father begging Jesus to heal his dying son — similar parental desperation for a child's healing.