'Assuredly' in the Bible

And it came to pass in those days, that the Philistines gathered their hosts together for warfare, to fight with Israel. And Achish said unto David, Know thou assuredly, that thou shalt go out with me in the host, thou and thy men.

Go and get thee in unto king David, and say unto him, Didst not thou, my lord, O king, swear unto thy handmaid, saying, Assuredly Solomon thy son shall reign after me, and he shall sit upon my throne? why then doth Adonijah reign?

And she said unto him, My lord, thou swarest by Jehovah thy God unto thy handmaid,'saying , Assuredly Solomon thy son shall reign after me, and he shall sit upon my throne.

verily as I sware unto thee by Jehovah, the God of Israel, saying, Assuredly Solomon thy son shall reign after me, and he shall sit upon my throne in my stead; verily so will I do this day.

Yea, I will rejoice over them to do them good, and I will plant them in this land assuredly with my whole heart and with my whole soul.

For thus saith Jehovah: Behold, they to whom it pertained not to drink of the cup shall assuredly drink; and art thou he that shall altogether go unpunished? thou shalt not go unpunished, but thou shalt surely drink.