BT Ket 105b(49) :קבולי לא בעאי דאקבל השתא הואיל ואמרת לי טעמ׳ מקבילנא‏ : I did not want to accept (anything) at all. Now since you said the reason to me I shall accept (it)
See the entire entry for qbl vb. to be opposed; D to receive