John 13:12-20 - The Meaning Of Footwashing
12 When he had washed their feet, and had put on his upper garments and taken his place, he spoke to them again. "Do you understand what I have been doing to you?" he asked. 13 "You yourselves call me 'the Teacher' and 'the Master', and you are right, for I am both. 14 If I, then--'the Master' and 'the Teacher'--have washed your feet, you also ought to wash one another's feet; 15 For I have given you an example, so that you may do just as I have done to you.
16 In truth I tell you, a servant is not greater than his master, nor yet a messenger than the man who sends him. 17 Now that you know these things, happy are you if you do them. 18 I am not speaking about all of you. I know whom I have chosen; but this is in fulfillment of the words of Scripture--'He that is eating my bread has lifted his heel against me.'
19 For the future I shall tell you of things before they take place, so that, when they take place, you may believe that I am what I am. 20 In truth I tell you, he who receives any one that I send receives me; and he who receives me receives him who sent me."