'Assuredly' in the Bible

In mine ears Jehovah of hosts hath said, Many houses shall assuredly become a desolation, great and excellent ones, without inhabitant.

Jehovah of hosts hath sworn saying, Assuredly as I have thought, so shall it come to pass; and as I have purposed, it shall stand:

And it was revealed in mine ears by Jehovah of hosts: Assuredly this iniquity shall not be purged from you till ye die, saith the Lord, Jehovah of hosts.