Brahma Sutras
ॐ तदभावनिर्धारणे च प्रवृत्तेः ॐ ॥ १-३-३७॥
And because (Gautama’s) inclination arose (to initiate and instruct Satyakama) when the absence of the (Sudrahood) had been ascertained.
english translation
OM tadabhAvanirdhAraNe ca pravRtteH OM ॥ 1-3-37॥
hk transliteration by Sanscript