Midras Kejadian 31:44: Midrash Tehillim & Bereshit Rabbah

"To the conductor upon the lilies, a testimony of David, to teach. This is what is said (Isaiah 50:8): 'Who will contend with me? Let us stand up together. Who is my adversary? Let him come near to me.' The Holy One, blessed be He, gave the Torah to Israel to respond with it to all the nations. When Joab went to fight against Aram, they said to him, 'You are not the son of Jacob,' as the verse states (Genesis 31:42), 'And now, if you would take my daughters, beware of harming them; for if you do, no man is present with us; look to God as witness between you and me.' Then Jacob took a stone and raised it as a pillar. When Joab heard this, he did not know what to do or how to answer. He went to David and said to him, 'This and that was said to me by the sons of Aram.' Immediately, the Sanhedrin, called 'Lilies', was convened. And so Solomon says (Song of Songs 7:3): 'Your belly is a heap of wheat, encircled with lilies.' Our forefathers made two covenants, one made by Abraham, as the verse states (Genesis 21:23), 'Now swear to me here by God that you will not deal falsely with me or with my offspring or with my posterity, but according to the kindness that I have done to you, you will do to me and to the land where you have sojourned.' And so they made a covenant. When the Philistines came to enter the land, they said to them, 'You are not the seed of Abraham, and you do not observe the commandments of the covenant that Abraham made with Abimelech.' They said to them, 'We do observe them,' and the Philistines went away. And so it says (Deuteronomy 2:23): 'The Avvim who lived in villages as far as Gaza, the Caphtorim who came from Caphtor, destroyed them and settled in their place.' They were protected by that covenant, and immediately they entered and possessed the land. And so when Aram said to Joab, 'You are not the son of Jacob,' Jacob made a covenant with Aram until this exile. He said to them, 'But they did not come first,' as the verse states (Numbers 22:5), 'Behold, a people came out of Egypt; behold, they cover the surface of the land, and they are dwelling opposite me.' Not only that, but also in the days of Cushan Rishathaim, as it says (Judges 3:8): 'Therefore, the anger of the Lord was kindled against Israel, and He sold them into the hands of Cushan Rishathaim, king of Mesopotamia.' They committed two transgressions, one in the days of Balaam, and one in the days of Cushan. Once they learned this from the Sanhedrin, Joab returned and said [to the Arameans], 'If I destroy them now, what will I do when I ascend from the war?'"

“Laban responded and said to Jacob: The girls are my daughters, and the boys are my sons, and the flocks are my flocks, and everything that you see is mine, and to my daughters, what can I do to them today, or to their children whom they have borne?” (Genesis 31:43).
“Laban responded and said to Jacob: The girls are my daughters, and the boys are my sons” – Rabbi Avin said: All of them were his daughters: “The girls are my daughters” – that is two; “And to my daughters, what can I do” – that is four.³²Bilha and Zilpa too. The Rabbis cite it from here: “If you afflict my daughters” (Genesis 31:50) – that is two; “or if you take wives in addition to my daughters” (Genesis 31:50) – that is four.
“And now let us, me and you, make a covenant, and let it be a witness between me and you” (Genesis 31:44).
“Jacob took a stone, and established it as a monument” (Genesis 31:45).
“Jacob took a stone” – Rabbi Yoḥanan said: It was like that protruding stone of Tiberias.
“Jacob said to his brethren: Gather stones, and they took stones and made a pile, and they ate there on the pile” (Genesis 31:46).
“Jacob said to his brethren: Gather stones” – how many brothers did he have? He had one, if only he had buried him. It is, rather, his sons, who are called his brethren in the sacred tongue. Rav Huna said: They were mighty like him; righteous like him. Rabbi Yudan said: When a person dons his father’s garments, he is like him.