Augustine of Hippo
Catena Aurea · Matthäusevangelium 20
Then came to him the mother of Zebedee’s children with her sons, worshipping him, and desiring a certain thing of him. And he said unto her, What wilt thou? She saith unto him, Grant that these my two sons may sit, the one on thy right hand, and the other on the left, in thy kingdom. But Jesus answered and said, Ye know not what ye ask. Are ye able to drink of the cup that I shall drink of, and to be baptized with the baptism that I am baptized with? They say unto him, We are able. And he saith unto them, Ye shall drink indeed of my cup, and be baptized with the baptism that I am baptized with: but to sit on my right hand, and on my left, is not mine to give, but it shall be given to them for whom it is prepared of my Father.
(de Trin i. 12.) Or otherwise; The Lord makes answer to His disciples in His character of servant; though whatever is prepared by the Father is also prepared by the Son, for He and the Father are one.