'Knees' in the Bible

And they smote him on the head with a reed, and did spit upon him, and bowing their knees worshipped him.

When Simon Peter saw it, he fell down at Jesus' knees, saying, Depart from me; for I am a sinful man, O Lord.

For this cause I bow my knees unto the Father of our Lord Jesus Christ,

Wherefore lift up the hands which hang down, and the feeble knees;