Philo Judaeus De Plantatione 94

[94] Thus, in truth, the wise man, following the practise of the first and greatest planter, displays his knowledge of husbandry; and the sacred scripture wishes the labours of husbandry to be performed, even by those of us who are not yet perfect, but who are still reckoned among the middle numbers of those things which are accounted duties; for it says, "When you go forth into the land which the Lord your God giveth to you, and when you plant every tree which is good for food, you shall completely purify its uncleanness. For three years it shall be unclean as to its fruit, it shall not be eaten; but in the fourth year, all its fruit shall be holy, being praised by the Lord. And in tile fifth year you shall eat the fruit thereof; and everything that it bears shall be useful to you: I am the Lord your God." ¹ Therefore it was impossible for the children of Israel, to plant those trees which are eatable, before they arrived in the country which had been given them by God: for he says,