An-Nisa · 4:103

103. When you, O believers, have finished the prayer, then remember Allah by glorifying Him by saying ‘Subḥān Allāh’, praising Him by saying ‘Alḥamdulillāh’ and declaring His Oneness by saying ‘Lā ilāha illallāh’. This is to be done however possible, whether you are standing, sitting or lying on your sides. When the fear is gone and you are safe, then establish the prayer by fulfilling all its articles, obligations and recommendations, as you have been instructed. Prayer is an obligation on the believers that is linked to particular times and may not be delayed without a valid reason when one is a resident. However, when you are travelling you are allowed to join and shorten prayers.