Matthew 5:26
Verily I say unto thee, Thou shalt by no means come out thence, till thou hast paid the uttermost farthing.
Cross-references
Matthew 18:34
Parallel
Matthew 18:34 repeats the same consequence: imprisonment until full repayment — reinforcing the warning about not settling debts.
Luke 12:59
Parallel
Luke 12:59 is the parallel account of the same teaching — the identical warning about paying the last penny before release.
James 2:13
Related theme
James 2:13 warns that the unmerciful face judgment without mercy — the same principle behind the harsh prison sentence here.