The sixth aliyah contains a law of the Shmittah year: Every seven years creditors are to forgive outstanding loans to Jews. This aliyah says that if we do this, there will be no poor among us and that G-d will bless us as follows: we shall lend to many nations, but none shall need to lend to us, and we shall rule over many nations, but none shall rule over us.
Also in this aliyah are some laws of tzedakah. Rashi derives from these laws that tzedakah to the poor of one's family has preference over other poor of one's city, and the poor of one's city has preference over other cities. The law of the Jewish slave is given here.
