'Surely' in the Bible

according to all that we hearkened unto Moses in, so we hearken unto thee; surely Jehovah thy God is with thee as He hath been with Moses.

and they say unto Joshua, 'Surely Jehovah hath given into our hand all the land; and also, all the inhabitants of the land have melted at our presence.'

Joshua said, “By this you shall know that the living God is among you, and that He will, without fail, drive out from before you the Canaanite, the Hittite, the Hivite, the Perizzite, the Girgashite, the Amorite, and the Jebusite.

and surely ye have kept from the devoted thing, lest ye devote yourselves, and have taken from the devoted thing, and have made the camp of Israel become a devoted thing, and have troubled it;

They replied to Joshua and said, “Because your servants were told in no uncertain terms that the Lord your God commanded His servant Moses to give you all the land, and to destroy all the land’s inhabitants before you, we feared greatly for our lives because of you, and so we did this [deceptive] thing.

And Moses sware on that day, saying, Surely the land whereon thy feet have trodden shall be thine inheritance, and thy children's for ever, because thou hast wholly followed the LORD my God.

'And surely, if the land of your possession is unclean, pass over for you unto the land of the possession of Jehovah, where the tabernacle of Jehovah hath tabernacled, and have possession in our midst; and against Jehovah rebel not, and against us rebel not, by your building for you an altar, besides the altar of Jehovah our God.

The Reubenites and Gadites named the altar, "Surely it is a Reminder to us that the Lord is God."