Origen — as excerpted in the Catena Aurea on Mark 14:3-9

“(in Matt. 35.) For they were grieved at the waste of the ointment, which might be sold for a large sum and given to the poor. This however ought not to have been, for it was right that it should be poured over the head of Christ, with a holy and fitting stream; wherefore it goes on, She hath wrought a good work on me. And so effectual is the praise of this good work, that it ought to excite all of us to fill the head of the Lord with sweet smelling and rich offerings, that of us it may be said that we have done a good work over the head of the Lord. For we always have with us, as long as we remain in this life, the poor who have need of the care of those who have made progress in the word, and are enriched in the wisdom of God; they are not however able always day and night to have with them the Son of God, that is, the Word and Wisdom of God. For it goes on: For ye have the poor always with you, and whensoever ye will ye may do them good; but me ye have not always.”