Ruth 2:10 - Joseph Benson’s Commentary on the Old and New Testaments

Then she fell on her face This was the humblest posture of reverence, either civil, when performed to men, or religious, when to God. And thus she shows both the lowliness of her mind and her gratitude. That thou shouldest take knowledge of me That is, shouldest so much as notice me, and especially show me any respect or kindness.