Reference for Avodah Zarah 73:11

על מנת שתצא חמה מנרתיקה מעכשיו קאמר לה וכי מיית בליליא הא ודאי תנאה הוי וגט מחיים הוא כדרב הונא דאמר רב הונא כל האומר על מנת כאומר מעכשיו דמי

[But if he said to her that the divorce should take effect] “on condition that the sun comes out from its sheath,” he intended it to take effect from that moment onward, and should he die at night, this was certainly a condition, and the divorce thus took effect while he was alive [and is valid] in agreement with the view of R. Huna. For R. Huna said: Anyone who says “on condition” [in a bill of divorce] it is the same as if he had said, “From now onward.”

Jastrow