4:103When you have completed the prayer, remember God, standing, or sitting, or on your sides. And when you feel secure, perform the prayer. The prayer is obligatory for believers at specific times.

4:140He has revealed to you in the Book that when you hear God’s revelations being rejected, or ridiculed, do not sit with them until they engage in some other subject. Otherwise, you would be like them. God will gather the hypocrites and the disbelievers, into Hell, altogether.