'Knees' in the Bible

When they came to the crowd, a man came up to Jesus, falling on his knees before Him and saying,

And a leper *came to Jesus, beseeching Him and falling on his knees before Him, and saying, “If You are willing, You can make me clean.”

Then falling on his knees, he cried out with a loud voice, “Lord, do not hold this sin against them!” Having said this, he fell asleep.

For this reason I bow my knees before the Father,

Therefore, strengthen the hands that are weak and the knees that are feeble,