Complex sentence: Jewish custom at the time dictated that mourners return to the tomb every day for three days, and once the Sabbath had passed the women returned at the earliest possible moment, bringing myrrh to anoint the body.
Split into simpler sentences: Jewish custom at the time dictated that mourners return to the tomb every day for three days. Once the Sabbath had passed, the women returned at the earliest possible moment, bringing myrrh to anoint the body.