Śrīmad-Bhāgavatam · Text 4.2.13
Who is speaking and story frame
लुप्तक्रियायाशुचये मानिने भिन्नसेतवे ।
अनिच्छन्नप्यदां बालां शूद्रायेवोशतीं गिरम् ॥ १३ ॥
lupta-kriyāyāśucaye
mānine bhinna-setave
anicchann apy adāṁ bālāṁ
śūdrāyevośatīṁ giram
I had no desire to give my daughter to this person, who has broken all rules of civility. Because of not observing the required rules and regulations, he is impure, but I was obliged to hand over my daughter to him just as one teaches the messages of the Vedas to a śūdra.
Read Śrīla Prabhupāda's purport on Vedabase.io