I heard Saeed bin Musayab being asked by an Arabi about a drink cooked down to half. He replied, "No, not until two-thirds of it has evaporated and one-third remains."
أخبرنا سويد قال أنبأنا عبد الله عن سفيان
سمعت سعيد بن المسيب وسأله أعرابي عن شراب يطبخ على النصف فقال لا حتى يذهب ثلثاه ويبقى الثلث
No references are available.
[Sahih] The following hadith serves as a corroborating witness for it.