John Lightfoot on Mark 10:17

[Kneeled to him.] So chapter 1:40, Beseeching him, and kneeling to him. This is variously rendered, He fell at his feet, bowing the knee, beseeching upon his knee, falling down at his knees. Which renderings are not improper, but I suspect something more is included. For, 1. It was customary for those that so adored to take hold of the knees or the legs, 2 Kings 4:27; Matthew 28:9. 2. To kiss the knees or the feet. See what we have said at Matthew 28:9.

When R. Akiba had been twelve years absent from his wife, and at last came back, his wife went out to meet him: "and when she came to him, falling upon her face, she kissed his knees." And a little after, when he was entered into the city, his father-in-law not knowing who he was, but suspecting him to be some great Rabbin, went to him, and falling upon his face kissed his knees. Speaking of Job, "Satan came, and he kissed his knees: but in all this Job sinned not with his lips," &c. When a certain Rabbin had discoursed of divers things, Bar Chama rose up and kissed his knees.