Midras Mazmur 27:13: Ein Yaakov (Glick Edition), Midrash Tehillim & Bereshit Rabbah

[It is written] (Ps. 66, 1.) A prayer of David, preserve my soul, for I am pious. R. Levi and R. Isaac both explain this passage. One said: "Thus said David before the Holy One, praised be He! 'Sovereign of the universe, am I not pious? Whereas all the kings of the east and west sleep until the third hour of the day, I rise at midnight to praise Thee.'" And the other said: "Thus said David before the Holy One, praised be He! 'Sovereign of the universe, am I not pious, whereas all the kings of the east and west sit companies in their glory, my hands are soiled in blood, membraneous-bag and after-birth in order to decide questions pertaining to family life; and moreover, whatever I do, I first consult Mephi-bosheth my teacher, saving to him: Meplu-bosheth my teacher, have I properly convicted? Have I properly acquitted? Have I properly declared pure? Have I properly declared impure? And I do not feel degraded [asking this].'" R. Joshua, the son of Ide, said: "What is the Biblical passage [that refers to this]? It is written (Ps. 119, 46.) And I will speak of thy testimony before kings and will not he ashamed." We are taught that his name (David's teacher) was not Mephi-bosheth but Ish-bosheth. Why was he called Mephi-bosheth? Because he insulted David during Halachic discussions; therefore, [because David humbly accepted these reproaches,] David was rewarded and Kilab came forth from him and R. Jochanan said: "His name was not Kilab but Daniel; why then was he called Kilab? Because he reproached Mephi-bosheth in matters of Halacha, and concerning him (Kilab) Solomon said in his wisdom (Pr. 23, 15.) My son, if thy heart be wise, my heart shall rejoice, even mine. And it is also said (Ib. 27, 11.) Become wise, my son, and cause my heart to rejoice that I may give an answer to him that reproacheth me." Why, did David call himself pious? Is it not written (Ps. 27, 13.) Unless I had to see the goodness of the Lord in the land of life, and we are taught in the name of R. Jose, "Why is the word Lulei (unless) dotted? David said before the Holy One, praised be He! 'Sovereign of the universe, I assuredly trust in Thee, knowing that Thou wilt properly reward the just when the time shall come [in the future world], but I doubt whether I shall have a share in them,' [Hence we infer that David did not consider himself a pious man.]" He was afraid because of the sin, as R. Jacob b. Ide said; for R. Jacob b. Ide raised the following contradictory question: "It is written (Gen. 28, 15.) And behold, I, (God) am with thee, (Jacob), and will keep thee withersoever thou goeth. And it is written (Ib. 32, 8.) And Jacob was greatly afraid and he felt distressed. [Why was he afraid after the Lord promised to be with him?] Jacob said: 'Perhaps there is some cause of sin which will prevent the fulfillment of His promise;' as we have been taught: 'It is said (Ex. 15, 16.) Till thy people pass over, O Lord, till this people pass over, which Thou hast purchased. Till thy people pass over, O Lord: refers to the first entrance, [into the land of Israel]; Till this people pass over which Thou hast purchased; refers to the second entrance [in the days of Ezra]. From this, declared the sages, it can be inferred that Israel was to be brought in [into the land of Israel] during the days of Ezra by the same miracles through which they entered the first time, in the days of Joshua ben Nun, but Israel's sins prevented the fulfillment of this."

"If I did not believe in seeing the goodness of the Lord. Zevadi the son of Levi said: Any place where it is stated 'if not for the merit of the forefathers' and the verse (Genesis 43:10) states 'for had we not delayed.' We ourselves would not have gone from there in peace except for the merit of the forefathers. Rabbi Yochanan said: Every 'if not for' is due to the merit of the Almighty, as it says (Isaiah 1:9) 'if not for the Lord of hosts.' Rabbi Levi said: It is due to the merit of the Torah, as it says (Psalms 119:92) 'If Your Torah had not been my delight.' And it is due to the merit of faith, 'If I did not believe in seeing the goodness of the Lord.'

“Had the God of my father, the God of Abraham, and the Fear of Isaac, not been with me, then now you would have sent me away empty-handed. God saw my hardship and the toil of my hands, and proved it last night” (Genesis 31:42).
“Had the God of my father, the God of Abraham, and the Fear of Isaac not been [lulei]” – Zavdi ben Levi and Rabbi Yehoshua ben Levi, Zavdi ben Levi said: Everywhere that lulei is stated, it came by the merit of the patriarchs. Rabbi Yehoshua ben Levi said to him: But is it not written: “For, had we not [lulei] tarried”? (Genesis 43:10).²⁷Judah said it to Jacob while trying to convince him to send Benjamin with them to Egypt. He said to him: Their very ascent was by the merit of the patriarchs, as had it not been for the merit of the patriarchs, they would not have ascended from there²⁸From Egypt. in peace.
Rabbi Tanḥuma said: There are those who express the statement of Rabbi Yehoshua ben Levi to Zavdi ben Levi: Rabbi Yehoshua ben Levi said: Everywhere that lulei is stated, it came by the merit of the patriarchs, except for this one.²⁹The one from Genesis 43:10 which was just mentioned. He said to him: This one, too, was by the merit of the patriarchs. Rabbi Yoḥanan said: Due to the sanctity of the Name.³⁰God saved them so they could sanctify His name. Rabbi Levi said: By the merit of faith and by the merit of Torah. By the merit of faith – “had I not [lulei] believed” (Psalms 27:13); by the merit of Torah – “had Your Torah not been my delight” (Psalms 119:92).
“God saw my hardship and the toil of my hands” – Rabbi Yirmeya said: Labor is more beloved than the merit of the patriarchs, as the merit of the patriarchs salvaged money, while labor saved lives. The merit of the patriarchs salvaged money, as it is stated: “Had the God of my father…not been…[then now you would have sent me away empty-handed].” Labor saved lives – “God saw my hardship and the toil of my hands, and proved it last night.”³¹When God warned Laban not to harm Jacob.