Qada

In certain circumstances one may be unable to perform one's prayer within the prescribed time period (waqt). In this case, the prayer must be performed as soon as one is able to do so. These prayers performed after the prescribed waqt are called qada. It is not permissible to deliberately miss performing the salat within its waqt with the intention of performing it afterwards. Hadhrat Jaabir (Allah be pleased with him) narrates that Muhammad said: "The distinguishing factor between kufr and Imaan is the deliberate neglect of Salaat." (Muslim).