Charles H. Spurgeon on Psalms 50:9

I will take no bullock out of thy house. Foolishly they dreamed that bullocks with horns and hoofs could please the Lord, when indeed he sought for hearts and souls. Impiously they fancied that Jehovah needed these supplies, and that if they fed his altar with their fat beasts, he would be content. What he intended for their instruction, they made their confidence. They remembered not that "to obey is better than sacrifice, and to hearken than the fat of rams." Nor he goats out of thy folds. He mentions these lesser victims as if to rouse their common sense to see that the great Creator could find not satisfaction in mere animal offerings. If he needed these, he would not appeal to their scanty stalls and folds; in fact, he here refuses to take so much as one, if they brought them under the false and dishonouring view, that they were in themselves pleasing to him. This shows that the sacrifices of the law were symbolical of higher and spiritual things, and were not pleasing to God except under their typical aspect. The believing worshipper looking beyond the outward was accepted, the unspiritual who had no respect to their meaning was wasting his substance, and blaspheming the God of heaven.