In 1 Melachim 13:30 it says:
And the prophet took up the carcass of the man of God, and laid it upon the ass, and brought it back: and the old prophet came to the city, to mourn and to bury him. And he laid his carcass in his own grave; and they mourned over him, saying, Alas my brother!
Why did the people of the city cry out ה֥וֹי אָחִֽי? Why the use of the word brother?
The Ralbag on this posuk offers an explanation that the city was paying tribute to this man. However, that does not explain the use of the word brother in this posuk.
Any commentaries that explain the deeper meaning behind the use of the word אָחִֽי when speaking of a man?