Midrasz do Hioba 1:10

(Fol. 112) Our Rabbis were taught: The following seven precepts did R. Akiba command his son R. Joshua to observe: "Do not, while you study, take a seat in the most populated part of the city. Dwell not in a city where its leaders are scholars. Do not enter suddenly even into thine own house, all the less so into thy neighbor's. Do not withhold shoes from thy feet. Rise early in the summer time and eat before the heat comes, and in the winter before the cold reaches thee. Make thy Sabbath [meals] as plain as on a week-day, lest thou come to depend for support on others. Try to get into touch with the man on whom fortune smiles [because you may also become fortunate]." R. Papa said: "This does not refer to buying from, or selling to, him (the fortunate man); but to enter into partnership with him." But the explanation R. Samuel b. Isaac makes is: "The passage (Job 1, 10) The work of his hands hast thou blessed, i.e., whoever took a Pruta (small coin) of Job was blessed," refers even to selling and buying.

This teaches that a man must not say: “I will eat and drink and enjoy the good things of life, but I will not work, for heaven will protect me.” It is said: Thou hast blessed the work of his hands (Job 1:10). Hence, a man must work and labor with both hands before the Holy One, blessed be He, will send his blessing.