Government Directorate of Passports in Saudi Arabia (Jawazat) has tweeted on their page that its important to carry your residence permit (Iqama) everytime you go outside.
Its important that expats cooperate in carrying Iqama on every checks to maintain security and stability.
Penalty or Fine for not carrying your Iqama
– SR 3,000 fine
– 6 Weeks of imprisonment
Carry your Iqama or Pay Fine of SR3000