'Fear of the Lord' in the Bible

And he took a yoke of oxen, and hewed them in pieces, and sent them throughout all the coasts of Israel by the hands of messengers, saying, Whosoever cometh not forth after Saul and after Samuel, so shall it be done unto his oxen. And the fear of the LORD fell on the people, and they came out with one consent.

If in the fear of the Lord you are his servants, hearing his voice and not going against the orders of the Lord, but being true to the Lord your God, you and the king ruling over you, then all will be well:

So Samuel made prayer to the Lord; and the Lord sent thunder and rain that day: and all the people were in fear of the Lord and of Samuel.

Only go in the fear of the Lord, and be his true servants with all your heart, keeping in mind what great things he has done for you.