'Doubtless' in the Bible

Doubtless , thou knowest, for thou wast then born, And the number of thy days is great!

He that goeth forth and weepeth, bearing seed for sowing, Shall doubtless come again with joy, bringing his sheaves with him .

And he said unto them, Doubtless ye will say unto me this parable, Physician, heal thyself: whatsoever we have heard done at Capernaum, do also here in thine own country.