Sangitisutta 2.1.41

2.1.41

Puna caparaṃ, āvuso, dussīlo sīlavipanno yaññadeva parisaṃ upasaṅkamati yadi khattiyaparisaṃ yadi brāhmaṇaparisaṃ yadi gahapatiparisaṃ yadi samaṇaparisaṃ, avisārado upasaṅkamati maṅkubhūto,

Furthermore, an unethical person enters any kind of assembly unconfident and embarrassed, whether it’s an assembly of aristocrats, brahmins, householders, or ascetics.