'Laboriously' in the Bible

For the land which you are entering to possess is not like the land of Egypt from which you have come, where you sowed your seed and watered it with your foot like a garden of vegetables.

and I saw every work of God, I concluded that man cannot discover the work which has been done under the sun. Even though man should seek laboriously, he will not discover; and though the wise man should say, “I know,” he cannot discover.