What are the positions of mouth, arms, legs and feet in the eyes of ancient Indians?

In ancient India, people thought that the cleanest and most sacred part of a person's body was the mouth, which was both the entrance of food and the exit of hymns. Brahman's job is to use his mouth. Naturally, a Brahman born in the mouth of God is also the most sacred and highest-ranking surname. However, Khshatriya, who was born in the arm, is inferior to Brahmins and should be engaged in fighting or governing the country, belonging to the second caste. Vedas born in legs are impure and vulgar, and they have to work hard all their lives to support Brahmins and Khshatriya, belonging to the lower third caste. As for sudra, he was born with dirty feet, so he was unclean and had a low status. He should serve other castes humbly. He is the fourth caste, the lowest and untouchable surname.