db={"requests":[{"_id":ObjectId("5e2bc785dc95d08ab83819ea"),"requestId":"REQ4","scrip":"5647"},{"_id":ObjectId("5e2bc785dc95d08ab83819eb"),"requestId":"REQ4","scrip":"5648"},{"_id":ObjectId("5e2bc785dc95d08ab83819ec"),"requestId":"REQ1","scrip":"0001"},{"_id":ObjectId("5e2bc785dc95d08ab83819ed"),"requestId":"REQ1","scrip":"0456"},{"_id":ObjectId("5e2bd901dc95d08ab83819f3"),"requestId":"REQ5","scrip":"5647111"}],"scrips":[{"_id":ObjectId("5e2bc7b4dc95d08ab83819ee"),"scrip":"0001"},{"_id":ObjectId("5e2bc7b4dc95d08ab83819ef"),"scrip":"0456"},{"_id":ObjectId("5e2bc7b4dc95d08ab83819f0"),"scrip":"5647"}]}

db.requests.aggregate([{$match:{requestId:{$in:["REQ4","REQ1","REQ5"]}}},{$lookup:{from:"scrips",localField:"scrip",foreignField:"scrip",as:"scrips"}},{$addFields:{scrips:{$arrayElemAt:["$scrips",0]}}},{$group:{_id:"$requestId",scrip:{$push:"$scrip"},scrips:{$push:"$scrips"}}},{$match:{$expr:{$eq:[{$size:"$scrip"},{$size:"$scrips"}]}}},{$project:{_id:0,requestId:"$_id",scrip:1}}])