A.T. Robertson Commentary Matthew 26:8

"But when the disciples saw it, they had indignation, saying, To what purpose is this waste?" — Matthew 26:8 (ASV)

This waste (η απωλεια αυτη). Dead loss (απωλεια) they considered it, nothing but sentimental aroma. It was a cruel shock to Mary of Bethany to hear this comment. Matthew does not tell as John does (John 12:4) that it was Judas who made the point which the rest endorsed. Mark explains that they mentioned "three hundred pence," while Matthew (26:9) only says "for much" (πολλου).