Fantastic, it was on page 219
I would note that this was written between 1685-1647 BC which comes by way of archological evidence that dates King Samsuiluna.
The document reads,
Ama-sukkal, the daughter of Ninurta-mansum, has been taken in marriage by Enlil-izzu, the high priest of Enlil, the son of Lugal-azida: Ama-Sukkal has brought 19 shekels of silver to Enlil-izzu, her husband (as dowry).
If Enlil-izzu ever says to Ama-sukkal, his wife, "You are no longer my wife," he shall return the 19 shekels of silver and he shall aslo weigh out 1/2 mina as her divorce-settlement. On the other hand, if Ama-Sukkal ever says to Enlil-izzu, her husband, "You are no longer my husband," she shall forfeit the 19 shekels of silver and she shall also weigh out 1/2 mina of silver. In mutual agreement they have sworn together by king.
(The names of eight men, two women, the scribe, and the notary as witnesses, each prededed by the witness-sign.)
(Sealed with two seals, twice each.)
The month of Nisan, the 28th day, the year Samsuiluna, the king, by the command of Enlil brought Kissurra and Sabum to obedience.
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I would note that Abram was much older than this document, as Abram would have come from the third dynasty. 2135-2025 BC
http://www.theology.edu/abraham.htm
That being said, the Sumarian picture of marriage is very different than the Biblical picture of marriage. Actually, the Sumarian picture looks more like the picture of an typical American marriage.
On page 217 we see a divorce under the heading, "New Summarian" which dates 2038-1990 which puts us a little closer to Abram. It simply reads,
Final Judgment: Lu-Utu, the son of Nig-Baba, divorced Geme-Enlil. Dugidu, and officer and official, took oath that Geme-Enlil had taken her stand. (and) said, "By the King! Give me 10 shekels of silver (and) I will not enter a claim against you," (and) that she made him forfeit 10 shekels of lilver. Ur-.. (was) teh deputy: Ur-Lama (was) the governor.
The year Harshi and Humurti were sacked.