From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
To Tame a Balky and Wild Horse.
Brown, Rap, Fox, or gray horse, be so tame and gentle, that whenever I sit upon thy back and ride thee, thou wilt bear me with as much patience as Jesus Christ was meek, patient, and humble, + + +
The grimoire Egyptian Secrets of Albertus Magnus lists this spell.
Timeline of related events
1725Publication of Egyptian Secrets of Albertus Magnus (lists this spell)
1869English-language translation of Egyptian Secrets (lists this spell)