Mark 9:22
And ofttimes it hath cast him into the fire, and into the waters, to destroy him: but if thou canst do any thing, have compassion on us, and help us.
Cross-reference
Mark 1:40-42 features a leper's conditional plea 'If you are willing,' paralleling the father's 'If you can' request for compassion.
In Matthew 15:22-28, a Canaanite woman pleads for her demon-possessed daughter — mirroring this father's plea for his son, both parents desperate for help.
In Matthew 17:15, the father says his son often falls into fire and water — the synoptic parallel account of this same story.
Matthew 8:2 echoes the leper's 'If you are willing' plea, similar to the father's conditional cry for help in this verse.
In Luke 8:43, a woman suffers a chronic condition no physician could heal, paralleling the boy's long-term affliction that others couldn't cure.
In Luke 17:13, ten lepers cry 'have mercy on us,' similar to the father's plea 'have compassion on us' — a direct appeal for healing.
Matthew 8:8 has the centurion humbly asking for a word to heal—contrasts with the father's doubting 'if you can' but both seek Jesus' help.
Matthew 9:28 shows blind men affirming Jesus' ability—contrasts with the father's uncertainty about whether Jesus can help.