Luke 18:1

And he spake a parable unto them to this end, that men ought always to pray, and not to faint;

He also spoke a parable to them that they must always pray, and not give up,

And he spake a parable unto them to the end that they ought always to pray, and not to faint;

And he spake also a simile to them, that it behoveth `us' always to pray, and not to faint,

Then Jesus told them a parable about their need to pray at all times and not lose heart: