Vyasasmriti 1.7

1.7

vipravadvipravinnāsu kṣatravinnāsu vipravat
jātakarmāṇi kurvīta tataḥ śūdrāsu śūdravat

Upon [wives] married by a brahmin, [the father] should perform birth rites like a brahmin; upon those married by a Kṣatriya, like a brahmin [or Kṣatriya];
thereafter, upon Śūdra women, like a Śūdra.