'Keep' in the Bible

Would you keep yourselves till they were old enough? would you keep from having husbands for them? No, my daughters; but I am very sad for you that the hand of the Lord is against me.

Wherever you die, I will die -- and there I will be buried. May the Lord punish me severely if I do not keep my promise! Only death will be able to separate me from you!"

And Boaz said to Ruth, Hearest thou not, my daughter? Go not to glean in another field, neither go from here, but keep here with my maidens.

Keep your eyes on the field where they are harvesting, and follow them. I've ordered my young men not to bother you, haven't I? And when you are thirsty, drink from the water vessels that the young men have filled."

And Ruth the Moabitess said, He said unto me also, Thou shalt keep fast by my young men, until they have ended all my harvest.

And he saith, 'Give the covering which is on thee, and keep hold on it;' and she keepeth hold on it, and he measureth six measures of barley, and layeth it on her; and he goeth into the city.

Then Boaz said, On the day when you take this field, you will have to take with it Ruth, the Moabitess, the wife of the dead, so that you may keep the name of the dead living in his heritage.

And, further, I have taken Ruth, the Moabitess, who was the wife of Mahlon, to be my wife, to keep the name of the dead man living in his heritage, so that his name may not be cut off from among his countrymen, and from the memory of his town: you are witnesses this day.