Midras Mazmur 139:23: Bereshit Rabbah & Midrash Tehillim

Rabbi Yudan and Rabbi Aivu in the name of Rabbi Yoḥanan: There were two people who said the same thing, Abraham and David. Abraham, of whom it is written: “My Lord God, what will You give me?” He said before Him: ‘Master of the universe, if I am destined to produce offspring and [they will ultimately] anger you, it is preferable for me that “I go childless.”’²⁷The verse is interpreted to mean: Abram said: What will You give me? [If it is unworthy descendants,] I would rather go childless. David said: “Search me, God, and know my heart; [try me and know my thoughts [sarapai]]” (Psalms 139:23) – know those who emerge from me.²⁸Sarapai can also mean branches that emerge from a tree. “And see, if there is any grievous way in me, lead me on the path to eternity” (Psalms 139:24). He said before Him: ‘Master of the universe, if I am destined to produce offspring who will aggrieve You, it is preferable for me that You lead me on the path to eternity.’²⁹It is preferable that You take my life.
“And the one who has charge of my house” – Rabbi Elazar says: “The one who has charge [meshek] of my house” – this is Lot, whose soul longs [shokeket] to inherit me. “Is Damascus Eliezer” – as on his account I pursued the kings to Damascus, and the Almighty helped me [azarani hael].³⁰According to this interpretation, Eliezer is not a name, but means “God was my assistance” (see Exodus 18:4). Reish Lakish said in the name of bar Kappara: “the one who has charge of my house” – the one who lives in my house is [Damascus] Eliezer, as it was through his help that I pursued the kings to Damascus. And Eliezer was his name. So it is stated: “He marshaled his disciples, born in his house, three hundred and eighteen” – the numerical value of Eliezer being three hundred and eighteen.

"To the chief Musician, a Psalm of David. O LORD, thou hast searched me, and known me. Zophar the Naamathite said (Job 11:7), 'Canst thou by searching find out God?' (Job 11:8) It is as high as heaven; what canst thou do? (Job 11:9) The measure thereof is longer than the earth, and broader than the sea. (Job 11:7) No man can find it out. (Job 23:8) And who can know it? For it is said (Job 23:10), 'God knoweth the way thereof, and he knoweth the place thereof.' (Job 28:24) For he looketh to the ends of the earth, and seeth under the whole heaven. No man can comprehend the works of the Lord. As David said, 'Who can utter the mighty acts of the LORD?' (Psalm 106:2) No man can reach the greatness of God's power. Even Moses, who ascended to the highest heavens and received the Torah directly from God, did not comprehend this. But God is eternal and He searches all things. Therefore, David gives Him the eternal praise and sings, 'O LORD, thou hast searched me, and known me.' This can be compared to a king who was eating with his wife, and while he was eating with her, he wrote her a bill of divorce and gave it to her. The woman began to say, 'See how wise my lord the king is. He knew that I had set my eyes on another man, and he gave me the bill of divorce.' Similarly, David said, 'Search me, O God, and know my heart: try me, and know my thoughts: And see if there be any wicked way in me, and lead me in the way everlasting.' (Psalm 139:23-24) For I have heard the reproach of the enemy, and the blasphemy of the wicked: for they bring upon me iniquity, and in wrath they hate me. Therefore, it is said, 'O LORD, thou hast searched me, and known me.'"