Charles H. Spurgeon on Psalms 56:12

Thy vows are upon me, O God. Whoever is conversant with the Psalms of David, will find him frequently making vows, and careful in paying them. When these words dropped from him he was just delivered out of a pressing danger among the Philistines, with whom he took shelter from the rage of King Saul, who unweariedly pursued him; but he soon found that the remembrance of his past achievements to their damage was still so fresh amongst them, and they so exasperated thereupon, that his life was in constant danger. In his distress he flies to God, his wonted refuge, and sends up earnest addresses to him, vowing if he would open a way for his deliverance out of these new straits, he would show his grateful sense of so signal a mercy, by the exactness and accuracy of his future obedience. God hears and succours him; and he thereupon grateful looks back, endeavours to renew the sense of his former obligation to his great Deliverer, and to stir up himself by suitable returns, and so cries out, Thy vows are upon me, O God; as if he should say, I resolve, O Lord, not to forget what was transacted while I was under my fears. Thou hast heard my cries, and I own myself firmly bound by my vows. I was serious and in earnest when I made them, and I will endeavour to show that I was so by my care to perform them. Thy vows, O God, made indeed on my part, but justly to be exacted on thine, are upon me, they do in reality hold me fast, and I desire not to be released. I am sensible I deserve to be stigmatised for a perfidious wretch if I ever forget them. This temper of holy David with reference to the vows he made on this occasion, should be ours with reference to all the sacred vows we any way come under. All Christians, as such, are necessarily under vows to the blessed God: and particular circumstances may make it expedient for us to come under special engagements to him. But wherever they are such as that they may justly be denominated vows of God, i.e., are such as his word will warrant; we should make holy David, as speaking in this text, our pattern, and set ourselves to imitate him, in seriously owning their binding force, and endeavouring to answer and pay them. Edmund Calamy, in "A Practical Discourse Concerning Vows," 1704.