It's the Memorare of course. I've known about this for decades and use it quite often. Wish I knew about it before French exams in college ... Who knows?
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And then there's this -
By whom and when was the Memorare composed?
And here is the prayer -
Remember, O most gracious Virgin Mary, that never was it known that anyone who fled to your protection, implored your help, or sought your intercession was left unaided. Inspired by this confidence, I fly unto you, O Virgin of virgins, my Mother. To you do I come, before you I stand, sinful and sorrowful. O Mother of the Word Incarnate, despise not my petitions, but in thy mercy, hear and answer me. Amen
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