In Luke 15:7, Jesus directly applies the parable: heaven rejoices over one repentant sinner, just as the shepherd's friends rejoiced.

In Luke 15:10, the same point: angels rejoice over a sinner's repentance, echoing the shepherd's call to rejoice.

In Luke 15:24, the prodigal's father says 'this son was lost and is found' — identical language to the lost sheep celebration.

Luke 15:9 mirrors this same call to rejoice over finding the lost coin — identical structure and theme within the same chapter.

Psalm 119:176 pictures the psalmist as a lost sheep asking God to seek him—directly echoing the lost sheep theme.

1 Peter 2:25 explicitly states believers were straying like sheep and have returned to the Shepherd—directly echoing the lost sheep parable.

Zephaniah 3:17 depicts God rejoicing over His saved people with loud singing, directly paralleling the shepherd's joy.