Midrash sa Mga Awit 48:7: Bereshit Rabbah & Sifrei Devarim

“Behold, the kings convened, passed together” (Psalms 48:5). “Behold the kings” – this is Judah and Joseph. “Passed [avru] together” – this one became filled with fury [evra] against that one, and that one became filled with fury against this one.⁸Joseph and Judah became angry with one another. “They saw it and were astonished” (Psalms 48:6) – “The men wondered to one another” (Genesis 43:33). “They were terrified; they hastened” (Psalms 48:6) – “[Joseph said to his brothers: I am Joseph; does my father still live?] And his brothers could not [answer him because they were alarmed before him]” (Genesis 45:3). “A fearful trembling seized them there” (Psalms 45:6) – these are the tribes. They said: ‘Kings are contending with one another; of what concern is it to us?⁹The other brothers felt it was not their place to intervene in the confrontation between Joseph and Judah. It is appropriate for a king to contend with a king.’
“Judah approached him” – “One approaches another” (Job 41:8) – this is Judah and Joseph. “Not even a breath comes between them” (Job 41:8) – these are the tribes. They said: ‘Kings are contending with one another; of what concern is it to us?’

The G-d who conferred "hacheil" His name upon you — what He did with no other nation (— you forgot Him), viz. (Shemoth 20:2) "I am the L-rd, your G-d." R. Meir says: The G-d shechechil ("who suffered pangs [chil]") over you, as in (Psalms 48:7) "chil, as a woman in labor." And (Ibid. 29:3) "The voice of the L-rd is upon the water ... (Ibid. 9) The voice of the L-rd yecholel [lit., "brings pangs"] upon the hinds." R. Yehudah says: He made you mechilin, mechilin (i.e., with many natural openings).