'Master' in the Bible

Truly, truly, I say to you, a slave is not greater than his master, nor is one who is sent greater than the one who sent him.

No longer do I call you slaves, for the slave does not know what his master is doing; but I have called you friends, for all things that I have heard from My Father I have made known to you.

Remember the word that I said to you, ‘A slave is not greater than his master.’ If they persecuted Me, they will also persecute you; if they kept My word, they will keep yours also.