Parashas Masei · Passuk 34:18 · TT note 1
Chabad.org — English translation + Rashi
Torah Temimah points to Kiddushin 42a (TT note on “וְנָשִׂיא אֶחָד”).
E-Daf — Kiddushin 42a · Sefaria
English: It was taught: Rav Giddel said in the name of Rav: From where do we know that when orphans come to divide their father’s estate, the court appoints for them a guardian both for advantage and for liability? From the verse “and one prince, one prince from each tribe you shall take.”
Halakhic derivation — tribal princes as model for court-appointed guardians of orphans.
The appointment of a prince per tribe to allot the land supplies the scriptural basis for a court appointing an apotropos for orphans who are dividing an estate.