Luke 15:26
And he called one of the servants, and asked what these things meant.
Cross-reference
Luke 18:36
Parallel
Luke 18:36 shows a blind man asking what is happening — a parallel inquiry about an event, but different contexts.
Acts 2:12
Parallel
Acts 2:12 has the crowd asking 'What does this mean?' — a direct parallel to the servant's inquiry about the celebration.