John Gill Commentary Mark 14:9

"And verily I say unto you, Wheresoever the gospel shall be preached throughout the whole world, that also which this woman hath done shall be spoken of for a memorial of her." — Mark 14:9 (ASV)

Verily I say to you
And you may assure yourselves of the truth of it:

wherever this Gospel ,
of the death and resurrection of Christ,

shall be preached throughout the whole world ,
as it shall be,

[this] also that she has done shall be spoken of for a memorial of
her ;
in remembrance of her, and her work, and in commendation of her faith, love, and duty; (See Gill on Matthew 26:13).