John 12:3

Then took Mary a pound of ointment of spikenard, very costly, and anointed the feet of Jesus, and wiped his feet with her hair: and the house was filled with the odor of the ointment.
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Cornelius a Lapide

AD 1637
Mary (Magdalene) therefore (that she might not be wanting on her part, and in order specially to honour Christ, and to surpass all others in her services, as she surpassed them in love) look a pound of ointment of spikenard, very costly. Ointment of nard was composed of several sweet scents (see Pliny H. N. xiii2), and was thick. But this was liquid, as S. Matt. ( Matthew 26:7) says that it was poured on His head. Liquids are very often weighed in vessels, or anyhow the nard itself from which the ointment was made. Or this pound was rather a measure of quantity, not of weight. Mystically. S. Augustine says, "The ointment was righteousness. Therefore it was of due weight" (libra). The Gloss says, "Mary before anointed His feet as a penitent; but now, when the righteousness of the perfect, and not the mere rudiments of penitence, are designated, she anoints His head and His feet. The pound of ointment is the perfection of righteousness. He anoints the head, who preaches high doctrines r...

Cyril of Alexandria

AD 444
While Martha was serving, Mary anointed the Lord with ointment, thus accomplishing her love towards Him; and by the actions of both, the measure of love was filled up and made perfect.

Knowing this first, that no prophecy of the scripture is of any private interpretation - 2 Peter 1:20

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