db={division:[{"_id":"5b28cab902f28e18b863bd36","name":"Premier League","teams":["5b28cab902f28e18b863bd01","5b28cab902f28e18b863bd02","5b28cab902f28e18b863bd03",]}],teams:[{"_id":"5b28cab902f28e18b863bd01","name":"Liverpool","players":["5b23tmb902f28e18b863bd01","5b23tmb902f28e18b863bd02","5b23tmb902f28e18b863bd03","5b2b9a8bbda339352cc39ec1"]}],players:[{"_id":"5b2b9a8bbda339352cc39ec1","name":"Mohamed Salah","nationality":["5b23cn1902f28e18b863bd01","5b23cn2902f28e18b863bd02",],}],countries:[{"_id":"5b23cn1902f28e18b863bd01","name":"England",},{"_id":"5b23cn2902f28e18b863bd02","name":"Egypt",}]}

db.division.aggregate([{$lookup:{from:"teams",let:{teams:"$teams"},pipeline:[{$match:{$expr:{$in:["$_id","$$teams"]}}},{$lookup:{from:"players",let:{players:"$players"},pipeline:[{$match:{$expr:{$in:["$_id","$$players"]}}},{$lookup:{from:"countries",localField:"nationality",foreignField:"_id",as:"nationality"}}],as:"players"}}],as:"teams"}}])