 Rabbi Johanan deduced from "Blessed are you who sow beside all waters, who send forth the feet of the ox and the donkey," that whoever engages in Torah study and charity is worthy of the inheritance of two tribes, Joseph and Issachar (as compares Joseph to an ox, and compares Issachar to a donkey).Rabbi Johanan equated "sowing" with "charity," as says, "Sow to yourselves in charity, reap in kindness.