John 4:53
So the father knew that it was at the same hour, in the which Jesus said unto him, Thy son liveth: and himself believed, and his whole house.
Cross-reference
John 4:51 reports the servants' news that the son lives — the direct prelude to the father's realization of the exact hour here.
Psalm 107:20 says God 'sent his word and healed them' — Jesus' spoken word heals the son, fulfilling that pattern.
In Matthew 8:8, the centurion asks Jesus to heal by a word from a distance — same faith in Jesus' authoritative command.
In Matthew 8:13, the servant is healed 'in the selfsame hour' — exactly like the son healed at the seventh hour.
In Acts 18:8, Crispus' whole household believed after Paul's preaching — a parallel to the nobleman's household believing after the healing.
Psalm 33:9 shows God's word instantaneously creates — here Jesus' word instantly heals, demonstrating divine authority.
Matthew 8:9 explains how authority works — Jesus' word carries the same command over illness as in this healing.