'Preserve' in the Bible

Come, let us make our father drunk with wine, and we will lie with him so that we may preserve our family through our father.”

Then the next day, the firstborn said to the younger, “Behold, I lay with my father last night; let us make him drunk with wine tonight also, and then you go in and lie with him, so that we may preserve our family through our father.”

Now do not be distressed or angry with yourselves because you sold me here, for God sent me ahead of you to save life and preserve our family.

God sent me [to Egypt] ahead of you to preserve for you a remnant on the earth, and to keep you alive by a great escape.