Garudapurana 2.4.72

2.4.72

kurudhvamityeva vadecchatavarṣāvare mṛte /
putrādyā vṛddhapūrvāste ekavastrāḥ śikhāṃ vinā //

and he should say, "Do so!" If one who has died is less than a hundred years old, / the sons and other relatives, led by the eldest, wearing a single garment, without a topknot,