Psalm 50:8-23 and 1 Samuel 15:16-23

Psalm 50:8-23
8 I will not reprove you for your sacrifices. Moreover, your holocausts are ever in my sight.
9 I will not accept calves from your house, nor he-goats from your flocks.
10 For all the wild beasts of the forest are mine: the cattle on the hills and the oxen.
11 I know all the flying things of the air, and the beauty of the field is with me.
12 If I should be hungry, I would not tell you: for the whole world is mine, and all its plentitude.
13 Shall I gnaw on the flesh of bulls? Or would I drink the blood of goats?
14 Offer to God the sacrifice of praise, and pay your vows to the Most High.
15 And call upon me in the day of tribulation. I will rescue you, and you will honor me.
16 But to the sinner, God has said: Why do you discourse on my justices, and take up my covenant through your mouth?
17 Truly, you have hated discipline, and you have cast my sermons behind you.
18 If you saw a thief, you ran with him, and you have placed your portion with adulterers.
19 Your mouth has abounded with malice, and your tongue has concocted deceits.
20 Sitting, you spoke against your brother, and you set up a scandal against your mother's son.
21 These things you have done, and I was silent. You thought, unjustly, that I ought to be like you. But I will reprove you, and I will set myself against your face.
22 Understand these things, you who forget God; lest at any time, he might quickly take you away, and there would be no one to rescue you.
23 The sacrifice of praise will honor me. And in that place is the journey by which I will reveal to him the salvation of God.
1 Samuel 15:16-23
16 Then Samuel said to Saul, "Permit me, and I will reveal to you what the Lord has said to me this night." And he said to him, "Speak."
17 And Samuel said: "Was it not when you were little in your own eyes that you were made the head of the tribes of Israel? And the Lord anointed you as king over Israel.
18 And the Lord sent you on the way, and he said: 'Go and put to death the sinners of Amalek. And you shall fight against them, even unto utter annihilation.'
19 Why then, did you not listen to the voice of the Lord? Instead, you turned to the spoils, and you did evil in the eyes of the Lord."
20 And Saul said to Samuel: "On the contrary, I did listen to the voice of the Lord, and I walked in the way along which the Lord sent me, and I led back Agag, the king of Amalek, and I put to death Amalek.
21 But the people took some of the spoils, sheep and oxen, as the first-fruits of those things that were slain, to immolate to the Lord their God at Gilgal."
22 And Samuel said: "Does the Lord want holocausts and victims, and not instead that the voice of the Lord should be obeyed? For obedience is better than sacrifice. And to heed is greater than to offer the fat of rams.
23 Therefore, it is like the sin of paganism to rebel. And it is like the crime of idolatry to refuse to obey. For this reason, therefore, because you have rejected the word of the Lord, the Lord has also rejected you from being king."