Charles H. Spurgeon on Psalms 69:31

This also shall please the Lord better than an ox or bullock that hath horns and hoofs. No sacrifice is so acceptable to God, who is a Spirit, as that which is spiritual. He accepted bullocks under a dim and symbolical dispensation; but in such offerings, in themselves considered, he had no pleasure. "Will I eat the flesh of bulls, or drink the blood of goats?" Here he puts dishonour upon mere outward offerings by speaking of the horns and hoofs, the offal of the victim. The opus operatum, which our ritualists think so much of, the Lord puffs at. The horning and hoofing are nothing to him, though to Jewish ritualists these were great points, and matters for critical examination; our modern rabbis are just as precise as to the mingling of water with their wine, the baking of their wafers, the cut of their vestments, and the performance of genuflections towards the right quarter of the compass. O fools, and slow of heart to perceive all that the Lord has declared. "Offer unto God thanksgiving" is the everlasting rubric of the true directory of worship. The depths of grief into which the suppliant had been plunged gave him all the richer an experience of divine power and grace in his salvation, and so qualified him to sing more sweetly "the song of loves." Such music is ever most acceptable to the infinite Jehovah.