It is narrated from Hazrat Abu Umamah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: When the time for an obligatory prayer comes upon a Muslim man and he stands up and performs ablution well, then offers the prayer well, all the sins committed between this prayer and the previous prayer are forgiven. Then when the time for the next obligatory prayer comes and he stands up and offers the prayer well, all the sins committed between this prayer and the previous prayer are forgiven.