John 8:35

The slave does not remain in the family ¹  forever, but the son remains forever. ² 

Now a slave has no permanent place in the family, but a son belongs to it for ever.

"The slave does not remain in the house forever; the son does remain forever.

A slave is not a permanent member of the family, but a son is part of the family forever.

A slave is a transient, who can't come and go at will. The Son, though, has an established position, the run of the house.

Now the servant does not go on living in the house for ever, but the son does.

The slave does not have a permanent place in the household; the son has a place there forever.

"And a slave does not abide in the house forever, but a son abides forever.

The slave does not remain in the family ¹  forever, but the son remains forever. ² 

¹ tn Or “household.” The Greek work οἰκία (oikia) can denote the family as consisting of relatives by both descent and marriage, as well as slaves and servants, living in the same house (more the concept of an “extended family”).

² sn Jesus’ point is that while a slave may be part of a family or household, the slave is not guaranteed a permanent place there, while a son, as a descendant or blood relative, will always be guaranteed a place in the family (remains forever).