Manuk Minasyan

// Retrieve all articles with at least one user where array of user id
$articles = Article::whereHas('users', function ($query) use ($users_id) {
    $query->whereIn('id', $users_id);
})->get();

Model::where(function ($query) {
    $query->where('user_id', 1)
        ->or_where('friend_id', 1);
})
->where(function ($query) {
    $query->where('user_id', 2)
        ->orWhere('friend_id', 2);
})
->get();