'Bowing' in the Bible

“Is it a fast like this which I choose, a day for a man to humble himself?Is it for bowing one’s head like a reedAnd for spreading out sackcloth and ashes as a bed?Will you call this a fast, even an acceptable day to the Lord?

“The sons of those who afflicted you will come bowing to you,And all those who despised you will bow themselves at the soles of your feet;And they will call you the city of the Lord,The Zion of the Holy One of Israel.