how to populate two collection on a same record in mongoose and node js

I'm very new in mongoose and node js. I get some troubles in my project. here is my user model

UserSchema = new Schema({
account:String,
password:String,
display_name:String )}

and friends model

FriendSchema = new Schema({

friend_from_id:{
    type:Schema.ObjectId,
    ref:'users'
},
friend_to_id:{
    type:Schema.ObjectId,
    ref:'users'
}});

and user_status model

UserStatusSchema = new Schema({

user_id:{
    type:Schema.ObjectId,
    ref:'users'
},
status:{
    type:Boolean
},
status_text:String,
last_updated_at:String});

how can I populate or any way to make a result from friend model like this

{
"_id": "55145b6b8b9c9e6c1f739441",
"friend_to_id": {
    "_id": "5502976dbef9fa180d28ea21",
    "display_name": "Jason",
    "account": "xxx@ginmed.com",
    "status":false,
    "status::"how it's going"
},
"friend_from_id": {
    "_id": "5502976dbef9fa180d28ea21",
    "display_name": "SonPham",
    "account": "yyy@ginmed.com",
    "status":true,
    "status::"how to do it"}

this mean I want to combine both user_status and user model in a field of friend model