Luke 18:18

And a certain ruler asked him
A young man, ( Matthew 19:20 ) a ruler among the Jews, a civil magistrate, and a very rich man; he ran after Jesus, and overtook him in the way, as he was going towards Jericho, ( Mark 10:17 )

saying, good master;
"Rabbi"; or doctor,

what shall I do to inherit eternal life?
(See Gill on Matthew 19:16).