"I have examined my heart in the night." As David said (Psalms 26:2), "Examine me, O Lord, and test me." God said to him, "You cannot stand." David said, "But I can stand." Once he was tested and did not falter, he began to shout, "Support me, and I will be saved!" God said to him, "Did I not tell you that you could not [stand]? Therefore, I call upon you, answer me."
Deliver your kindness, Savior of the needy. David said before the Lord, our Master, "Grant me from that which is destined for me, and keep watch over me." Therefore, He guarded me like the pupil of an eye. Rabbi Yudan said in the name of Rabbi, "There is no square cubit in the entire universe where there are not nine harmful spirits, and when a person puts his hand into them, the Lord guards him." Rabbi Yehoshua ben Levi said, "When a person travels along the way, a heavenly escort walks before him and proclaims, 'Make way for the escort of the Holy One, blessed be He.'" The rabbis said, "This is comparable to a person carrying a jar of oil on his head, with a swarm of wasps flying after him. The owner of the field said to him, 'Go and walk in the company of my laborers.'" When they approach him from the right, they are good omens, but from the left they are bad omens, as it is said, "Thousands at Your right hand, but it will not come near you." But the left hand only has control over one mitzvah, which is the mitzvah of tefillin, as it is said, "Bind them as a sign on your hand." Therefore, a thousand were assigned to the left. What is the meaning of "it will not come near you"? The Lord said, in accordance with the custom of the world, when a king goes out on a journey, all of his officials go out to guard him, and he needs them to provide for each and every one of them. But I have entrusted to you a thousand from the left and ten thousand from the right who are in need of you to guard you, and there is no one to help you and no one to say to you, "Provide for me." Rabbi Chanina said, "He did not say 'they shall fall' (in Hebrew: yipol) from your side a thousand, but rather, 'he shall fall.' For if harmful angels come upon you, these angels will fall before you." Another explanation of "he shall fall" is that the Holy One, blessed be He, will provide for you, as it says, "And from Menasheh there fell (yipolu) upon David" (I Chronicles 12:19). And all these angels that were given to man to protect him, protect him when he guards the Torah. Rabbi Elazar HaKappar said that God said to man, "Let My lamp be in your hand and your lamp be in Mine. 'My lamp in your hand,' as it says, 'For a commandment is a lamp and Torah is light' (Proverbs 6:23). 'Your lamp in Mine,' as it says, 'The lamp of God is the soul of man' (Proverbs 20:27). If you guard what is Mine, I will guard what is yours." Rabbi Chiya gave a parable: To what is this matter comparable? To two people who had vineyards, one in the Galilee and one in Judea. The one in the Galilee had his vineyard in Judea and the one in Judea had his vineyard in the Galilee. One day, one of them came to the other and said, "Guard my vineyard in the Galilee, and I will guard your vineyard in Judea. And if you lose my vineyard, I will lose your vineyard." So said the Holy One, blessed be He, to Israel: "If you guard the Torah, I will guard you," as it says, "If you shall diligently keep all this commandment which I command you to do it...then will the Lord...keep the covenant and mercy with them that love Him and keep His commandments" (Deuteronomy 7:12)....