In an effort to boost sluggish tickets sales for Sunday’s Knicks’ charity game against Maccabi Tel Aviv at the Garden, the event’s organizer is in discussions with Sacramento to bring Israeli rookie Omri Casspi to the Garden to retire his Maccabi number, The Post has learned.

Casspi, after being drafted in the first round last June, will become the first Israeli to play in an NBA game.

Migdal Ohr, the Israeli orphanage the game benefits, is seeking permission from Kings coach Paul Westphal to fly Casspi cross-country, with prospective plans to have him toss the ceremonial opening tip and have his yellow and blue “18” retired. Casspi would have to miss the Kings’ practice Sunday.

According to Robert Katz, the VP of Migdal Ohr, tickets sales are way behind the rate from the Maccabi-Knicks game two years ago that drew 18,500 — the largest Knicks preseason home game in history. Ohr is in charge of selling tickets as the Maccabi game was not part of the Knicks’ season-ticket plan.