Markandeyapurana 35.47

35.47

sapiṇḍānāṃ sapiṇḍastu mṛte 'nyasminmṛto yadi /
pūrvāśaucasamākhyātaiḥ kāryāstvatra dinaiḥ kriyāḥ //

If a person dies directly of his own free will, by the sword, by water, by hanging, or by fire, by poison, by a fall, or in any other unnatural way, or by religious fasting to death, or by fasting to death from vindictive motives;[8] or if he dies as a child, or as a sojourner in a foreign country, or as a religious mendicant, purification will be effected at once; and others say the period of impurity[9] is declared to be three days for the sapiṇḍas; but if, after the other person is dead, the sapiṇḍa also dies, in this case the ceremonies must be performed during the days called the period of the first impurity.