'Spring' in the Bible

Does a spring pour out sweet and bitter water from the same opening?

Can a fig tree produce olives, my brothers, or a grapevine produce figs? Neither can a saltwater spring yield fresh water.

So be patient, brothers, until the coming of the Lord. See how the farmer waits for the precious crop from his land, being patient with it until it receives the fall and the spring rains.

and again he prayed, and the heaven gave rain, and the earth caused its fruit to spring forth.