Isaiah 20:2

20:2 At that time the Lord announced through Isaiah son of Amoz: “Go, remove the sackcloth from your waist and take your sandals off your feet.” He did as instructed and walked around in undergarments and barefoot.

Isaiah 49:23

49:23 Kings will be your children’s guardians;

their princesses will nurse your children.

With their faces to the ground they will bow down to you

and they will lick the dirt on your feet.

Then you will recognize that I am the Lord;

those who wait patiently for me are not put to shame.

Isaiah 58:13

58:13 You must observe the Sabbath

rather than doing anything you please on my holy day.

You must look forward to the Sabbath

and treat the Lord’s holy day with respect.

You must treat it with respect by refraining from your normal activities,

and by refraining from your selfish pursuits and from making business deals.