This is not an error of duplication. The full-fledged version of this Mitzvah are many and change for those who are learning the one/three chapter a day. The Message for the day from "Bringing Heaven Down to Earth" at the end of this Mitzvah is different than that of yesterday.

Positive Mitzvah 127: The First Tithe
Numbers 18:24 "But the tithes of the Children of Israel which they offer as a gift"

We are commanded to give a tenth of all the land's produce to the Levites.

The Levites were not given an inheritance of land as were the other tribes.

Instead, this share of our crop is considered their inheritance.

Since there are other types of "tithes," (which means: a tenth of the amount), this one is called: "The First Tithe."

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On their exodus from Egypt, towards Mount Sinai, the Jewish People arrived at an obstacle -- the Red Sea. They divided into four parties.

1. One prepared to fight.

2. One said to surrender and return.

3. One advocated mass suicide.

4. One began to pray.

G-d spoke to Moses and said, "Why are you crying out to me? I told you to travel straight ahead. Keep going and you will see there is no obstacle!"

The Jewish People kept going and the obstacle became a miracle.

From: Bringing Heaven Down to Earth by Tzvi Freeman - tzvif@aol.com