John Gill Commentary Psalms 22:19

"But be not thou far off, O Jehovah: O thou my succor, haste thee to help me." — Psalms 22:19 (ASV)

But be not thou far from me, O Lord
(See Gill on Psalms 22:11);

O my strength ;
Christ as God is the mighty God, the Almighty; as Mediator, he is the strength of his people; but, as man, God is his strength; he is the man of his right hand, whom he has made strong for himself, and whom he has promised his arm shall strengthen, (Psalms 80:17) (89:21) ; and therefore he addresses him in this manner here, saying,

haste thee to help me ;
his help was alone in God his strength; there were none that could help him but he, and he seemed to stand afar off from helping him, (Psalms 22:1Psalms 22:11) ; and his case being so distressed, as is represented in the preceding verses, it required haste.