Mark 15:6
Now at that feast he released unto them one prisoner, whomsoever they desired.
Cross-references
Matthew 27:15
Parallel
Matthew 27:15 recounts the same Passover release custom, confirming the practice.
Luke 23:17
Parallel
Luke 23:17 describes the same feast release obligation, corroborating the custom.
John 18:39
Parallel
John 18:39 mentions the same Passover release custom, explicitly linking it to Jesus.
John 18:40
Parallel
John 18:40 specifies Barabbas was a robber, adding detail to the release custom described here.
Luke 23:25
Parallel
Luke 23:25 records the same release of Barabbas, noting he was imprisoned for insurrection and murder.