It was taught: Rabbi Elazar HaKappar says: A person should always ask for mercy about this condition [of poverty]; for if it does not come to him, it comes to his son, and if it does not come to his son, it comes to his son’s son, as it says, “For because of [biglal] this thing” (Devarim 15:10). It was taught in the school of Rabbi Yishmael: It is a wheel [galgal] that turns in the world.