Samskara संस्कार, are sacraments in Indian religions, described in ancient Sanskrit texts, as well as a concept in the karma theory of Indian philosophies.
The word literally means "putting together, making perfect, getting ready, to prepare", or "a sacred or sanctifying ceremony" in ancient Sanskrit and Pali texts of India.
https://en.wikipedia.org/wiki/Samskara_(rite_of_passage)
Novel by that name https://archive.org/stream/in.ernet.dli.2015.273508/2015.273508.Samskara_djvu.txt
Brahmin samskaras. https://www.srimatham.com/death-samskara.html
Tamil Brahmin Death Rituals
This write-up is based on the procedure laid down by Sage Apastamba which is followed by the majority of Yajurvedi Tamil Brahmins. The mantras and some parts of the procedure could vary in other Grihya Sutras. Throughout this write-up, the rituals will be narrated as the eldest son would do for his father. There could be some changes in the case of another relationship.