The incident occurred yesterday when among others the youth, named Kala, son of a sarpanch Shamsher Singh, was garlanding the Legislator during an election meeting, police sources said today.
He threw the garland aside and slapped him, they said.
Later, the people present there thrashed the youth but Selwal announced to forgive him.
Singh also condemned the incident.
The sources said that the youth was said to be unhappy with the legislator for allegedly not releasing the grants for the development of his village.