Midrasch zu Schemot 23:18

14) You say that "all the night" signifies that they were to be placed there at sunset and left burning on the altar the entire night. But perhaps it signifies that they are to be lifted from the ground to the altar the entire night. (This cannot be contended, for) "There shall not remain the fat of My festival offering until morning" (Shemoth 23:18) (already) teaches that they are to be lifted from the ground to the altar the entire night.