'Add' in the Bible

Woe unto them that add house to house, that join field to field, until there is no more room, and that ye dwell yourselves alone in the midst of the land!

Woe to Ariel, to Ariel, the city of David's encampment! Add ye year to year; let the feasts come round.

Go and say to Hezekiah, Thus saith Jehovah, the God of David thy father: I have heard thy prayer, I have seen thy tears: behold, I will add to thy days fifteen years.