These relations cannot inhere in God accidentally, because the operations on which the relations follow directly are the very substance of God, and also because, as was shown above ‘48 there can be no accident in God. Hence, if the relations are really in God, they cannot be accidentally inherent, but must be subsistent. How it is that what is an accident in other things, can exist substantially in God, is clear from the doctrine previously set forth.
St. Thomas Aquinas. (1265-1274). Compendium Theologiae: Relations in God Not Accidental, trans. by Cyril Vollert. St. Louis & London: B. Herder Book Co., 1947
All scripture is given by inspiration of God and is profitable for doctrine, reproof, correction, and instruction in righteousness (2 Timothy 3:16).