הלכה על ויקרא 6:3

The commandment of the lifting of the ashes: That the priest remove the ashes each and every day from on the altar - and this is what is called the lifting of the ashes (trumat hadeshen), which was done every day - as it is stated (Leviticus 6:3), "And the priest shall dress in linen, etc. and he shall lift the ashes."