Drink — He shall have a large portion of afflictions, while he is in the way or course of his life, before he comes to that honour of sitting at his father's right — hand. Waters in scripture frequently signify sufferings. To drink of them, signifies to feel or bear them. Therefore — He shall be exalted to great glory and felicity.
Related Commentaries of Psalms 110:7
Psalms 110:7
7 He shall drink of the brook in the way: therefore shall he lift up the head.