With Ambaṭṭha 1.16.10

1.16.10

Iti kho te, ambaṭṭha, porāṇaṃ mātāpettikaṃ nāmagottaṃ anussarato ayyaputtā sakyā bhavanti, dāsiputto tvamasi sakyānan”ti.

That’s how, recollecting the ancient name and clan of your mother and father, the Sakyans were the children of the masters, while you’re descended from the son of a slavegirl of the Sakyans.”