is the fulfillment of his oath to God here?
So that day Esau started on his way back to Seir. Jacob, however, went to Sukkoth, where he built a place for himself and made shelters for his livestock. That is why the place is called Sukkoth.After Jacob came from Paddan Aram, he arrived safely at the city of Shechem in Canaan and camped within sight of the city. For a hundred pieces of silver, he bought from the sons of Hamor, the father of Shechem, the plot of ground where he pitched his tent. There he set up an altar and called it El Elohe Israel.(Genesis 33:16-20)this is after his journey. he set up an altar -- naturally we suppose on that altar he made sacrifices.
how much of his livestock and his produce did he sacrifice? a tenth of it?
if so then what Jacob did with this one-time "tithe" was devote it as burnt offerings, not as material support for the Levites nor as food for the poor, which is what the tithe of the law is. i don't see evidence that they regularly donated their flocks and the produce of their land to a priest.