What does the text say about the 'Upanayana' or sacred thread ceremony, one of the sixteen rituals mentioned?

The provided text from Chapter 2 mentions that there are 'sixteen rituals for the body' from birth to death, but it does not provide any details about the 'Upanayana' or sacred thread ceremony. The only ritual specifically named and singled out for discussion is the 'naming ceremony' (Namakaran). The author, who identifies himself as Hemadpant, promises to tell the story of how he received his name, which is related to this naming ceremony. Therefore, while the existence of sixteen rituals is acknowledged in Chapter 2, the content in these specific chunks does not contain information on the Upanayana ceremony.