According to this website, it says...
The Buddha classified persons into four kinds on the basis of one’s attitude towards one’s own interest and one’s attitude towards the interest of others.
I started source text research and I found this website, using the search word of
attahitaya ca patipanno parahitaya ca
The website says its source text is
Sutta Pitaka Vol 13 : Sutta. Aṅ. (2): catukkanipāto 96
But I could not find such text on SuttaCentral.
Does anyone know the correct index of the text?