B'resheet 34:1-17 Now Dinah the daughter of Leah, whom she had borne to Ya'akov, went out to visit the daughters of the land. And when Sh'khem the son of Hamor the Hivite, the prince of the land, saw her, he took her and lay with her by force. And he was deeply attracted to Dinah the daughter of Ya'akov, and he loved the girl and spoke tenderly to her. So Sh'khem spoke to his father Hamor, saying, "Get me this young girl for a wife." Now Ya'akov heard that he had defiled Dinah his daughter; but his sons were with his livestock in the field, so Ya'akov kept silent until they came in. Then Hamor the father of Sh'khem went out to Ya'akov to speak with him. Now the sons of Ya'akov came in from the field when they heard it; and the men were grieved, and they were very angry because he had done a disgraceful thing in Israel by lying with Ya'akov's daughter, for such a thing ought not to be done. But Hamor spoke with them, saying, "The soul of my son Sh'khem longs for your daughter; please give her to him in marriage. And intermarry with us; give your daughters to us, and take our daughters for yourselves. Thus you shall live with us, and the land shall be open before you; live and trade in it, and acquire property in it." Sh'khem also said to her father and to her brothers, "If I find favor in your sight, then I will give whatever you say to me. Ask me ever so much bridal payment and gift, and I will give according as you say to me; but give me the girl in marriage." But Ya'akov's sons answered Sh'khem and his father Hamor, with deceit, and spoke to them, because he had defiled Dinah their sister. And they said to them, "We cannot do this thing, to give our sister to one who is uncircumcised, for that would be a disgrace to us. Only on this condition will we consent to you: if you will become like us, in that every male of you be circumcised, then we will give our daughters to you, and we will take your daughters for ourselves, and we will live with you and become one people. But if you will not listen to us to be circumcised, then we will take our daughter and go."
In Israel - Already they refer to their family as Israel.
The corresponding letter is Lamed-teaching and learning.
Here we see Ya'akov's sons promising shalom (peace) if only they all were circumcised in the flesh. Yeshua's children promise shalom (peace) with HaShem and then they all become circumcised in the heart. Go toward shalom (peace).
D'varim (Deuteronomy) 30:6 Moreover the L-RD your G-d will circumcise your heart and the heart of your descendants, to love the L-RD your G-d with all your heart and with all your soul, in order that you may live.
Yirmeyahu (Jeremiah) 31:33-34 "But this is the covenant which I will make with the house of Israel after those days," declares the L-RD, "I will put My law within them, and on their heart I will write it; and I will be their G-d, and they shall be My people. "And they shall not teach again, each man his neighbor and each man his brother, saying, 'Know the L-RD,' for they shall all know Me, from the least of them to the greatest of them," declares the L-RD, "for I will forgive their iniquity, and their sin I will remember no more."
Romans 2:29 But he is Jewish who is one inwardly; and circumcision is that which is of the heart, by the Spirit, not by the letter; and his praise is not from men, but from G-d.
Back to Ya'akov's daughter:
B'resheet 34:18-24 Now their words seemed reasonable to Hamor and Sh'khem, Hamor's son. And the young man did not delay to do the thing, because he was delighted with Ya'akov's daughter. Now he was more respected than all the household of his father. So Hamor and his son Sh'khem came to the gate of their city, and spoke to the men of their city, saying, "These men are friendly with us; therefore let them live in the land and trade in it, for look, the land is large enough for them. Let us take their daughters in marriage, and give our daughters to them. Only on this condition will the men consent to us to live with us, to become one people: that every male among us be circumcised as they are circumcised. Will not their livestock and their property and all their animals be ours? Only let us consent to them, and they will live with us." And all who went out of the gate of his city listened to Hamor and to his son Sh'khem, and every male was circumcised, all who went out of the gate of his city.
All these men where willing to become circumcised in the flesh and to become one people. In contrast, we have a hardness of heart with much of Israel (not then but today) and they are unwilling to become circumcised of heart to become one with the spiritual children of Yeshua and in turn the Father above. Instead they treat Yeshua's children as a harlot following other gods. Should we be treated as a harlot?