BT Šab 133b(31) :דאמרי ליה דילמ׳ לא מספקת ליה ואמ׳ להו מספיקנא‏ : they said to him: "Perhaps you will not have sufficient time for it [i.e. the circumcision]." He said to them: "I shall have sufficient time"
See the entire entry for spq vb. to be sufficient