De Decem Chordis, v. 450;

De Natura et Gratia, v. 467;

De Opere Monachorum, i. 445;

De Vera Penitentia, v. 453;

Epistolae, v. 449;

In Psalmos, v. 263, 461, 466, 468;

Sermo 181, v. 473;

and see v. 221, 451.

*Averroes, or Ebn Roschd (12th century), v. 41, 42.

*Avicenna, or Ebn Sina (11th century), v. 41, 42, 289, 290.