Jesus poured out His own blood and water

2 Samuel 23:14-17
14 David was then in the stronghold, and the garrison of the Philistines was then in Bethlehem.
15 And David said with longing, "Oh, that someone would give me a drink of the water from the well of Bethlehem, which is by the gate!"
16 So the three mighty men broke through the camp of the Philistines, drew water from the well of Bethlehem that was by the gate, and took it and brought it to David. Nevertheless he would not drink it, but poured it out to the LORD.
17 And he said, "Far be it from me, O LORD, that I should do this! Is this not the blood of the men who went in jeopardy of their lives?" Therefore he would not drink it. These things were done by the three mighty men.

David's three mighty men risked their lives to do a very good deed for David. In fact, it was because of this deed that they became the top three men of David.

But David would not drink the water they brought back from Bethlehem because it represented their blood. Instead, he poured it out to the Lord.

Jesus, too, would not "drink" of our best deeds done for him.

Hebrews 10:5
"Sacrifice and offering You did not desire,

And instead of us risking our lives for Him, He laid down His life for us, and poured out before God His own blood and water.

John 10:15
15 As the Father knows Me, even so I know the Father; and I lay down My life for the sheep.

John 19:34-35
34 But one of the soldiers pierced His side with a spear, and immediately blood and water came out.