Charles H. Spurgeon on Psalms 109:4

For my love they are my adversaries; that's an ill requital; but how did David requite them? We may take his own word for it; he tells us how, "But I give myself unto prayer"; yea, he seemed a man wholly given unto prayer. The elegant conciseness of the Hebrew is, "But I prayer"; we supply it thus, "But I give myself unto prayer." They are sinning against me, requiting my love with hatred, "But I give myself unto prayer." But for whom did he pray? Doubtless he prayed and prayed much for himself; he prayed also for them. We may understand these words, "I give myself unto prayer", two ways. First I pray against their plots and evil dealings with me (prayer was David's best strength always against his enemies), yet that was not all. But, secondly, "I give myself unto prayer", that the Lord would pardon their sin, and turn their hearts, when they are doing me mischief; or, though they have done me mischief, I am wishing them the best good. David (in another place) showed what a spirit of charity he was clothed with, when no reproof could hinder him from praying for others, Ps 141:5. —Joseph Caryl.