'Slave' in the Bible

Jesus replied to them, "Truly, truly I say to you, that everyone who commits sin is a slave of sin.

And the slave does not remain in the household {forever}; the son remains {forever}.

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

No longer do I call you slaves, because the slave does not know what his master is doing. But I have called you friends, because everything that I have heard from my Father I have revealed 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.

Then Simon Peter, who had a sword, drew it and struck the slave of the high priest and cut off his right ear. (Now the name of the slave was Malchus.)

Then the female slave [who was] the doorkeeper said to Peter, "You are not also [one] of the disciples of this man, [are you]?" He said, "I am not!"