Midrash su Salmi 145:19

“To do as every man desired.” The Holy One blessed be He said: ‘I do not fulfill the wishes of all My creatures, and you seek “to do as every man desired?”’ The way of the world is that if two men seek to marry one woman, can she marry them both? Rather, it is either to one, or to the other. Likewise, if two ships were waiting in harbor, one seeking a north wind and one seeking a south wind, can one wind propel both of them together? Rather, it is either for one or for the other. Tomorrow, two people will come before you for judgment, a Jewish man, and an adversary and enemy, can you satisfy both of them? Rather, you elevate one and hang the other.
Rav Huna said in the name of Rabbi Binyamin bar Levi: Because in this world, when the northern wind blows, the southern wind does not blow, and when the southern wind blows, the northern wind does not blow. However, in the future, with the ingathering of the exiles, the Holy One blessed be He will say: ‘I am bringing an unusual wind to the world, in which two winds serve simultaneously.’ That is as it is written: “I will say to the north: Give, and to the south: Do not withhold; bring My sons from afar and My daughters from the ends of the earth” (Isaiah 43:6). Who is it who does the will of those who fear Him? It is the Holy One blessed be He about whom it is written: “He performs the will of those who fear him, and He hears their cry and delivers them” (Psalms 145:19).

Law: A Jewish person who does not pray the morning prayer, or the Musaf prayer, or the afternoon prayer, many times; that he didn't have time for prayer, or he abridged it to take care of his [toilet] needs, or he had traveled and forgot to pray: Which time is permitted for him to pray and fulfill his obligation? What is he required to do? So taught the sages: The morning prayer is til midday, the afternoon prayer til nightfall, evening prayer has no fixed [time]. But for the Musaf [prayers], all day. Rabbi Elazar said: [If] he forgot and did not pray the Musaf prayer, and he came to pray the afternoon prayer, he should pray the afternoon prayer and afterward the Musaf prayer. Why? For everything was created for its time. The evening prayer has no fixed [time], until dawn. Why? As it is written, (Proverbs 8:17), "I love those who love me and those who seek me find me." And all those who pray and set their hearts [in concentration] for prayer, it is a good sign that his prayer is accepted, as it says, (Psalms 10:17) "You hear the desire of the afflicted..." Great is prayer before the Holy One, blessed be He. Rabbi Elazar said, "Do you want to know the power of prayer? If it does not accomplish the whole [request], it accomplishes half of it. [To illustrate, when] Cain overtook his brother Abel and murdered him, a [divine] decree went out, (Genesis 4:12) 'You will be a restless wanderer (na v'nad) on earth.' Immediately, he stood and confessed before the Holy One, blessed be He, as it says, (Genesis 4:13) 'My punishment is more than one can bear.' He said before Him: Master of the World! You bear the whole world, yet my sin You cannot bear? You wrote, (Micah 7:18) 'Who bears sin and forgives the transgression,' forgiving the great sinner. Immediately, he found kindness before the Holy One, blessed be He, and He held back the "restlessness" (na), half the decree, and so it is written (Genesis 4:16) 'And he dwelled in the land of Nod [wandering, but not na, restlessness]. From here you learn that prayer is held great before the Holy One, blessed be He. And so for Hezekiah, when He told him, (II Kings 20:1) 'Put your house in order, because you are going to die...' immediately (II Kings 20:2) 'Hezekiah turned his face to the wall [and prayed to God]...' The Holy One, blessed be He, said to him: (II Kings 20:5-6) 'I have heard your prayer... I have added 15 years for your life...' So is it written, (Psalms 145:19) 'He fulfills the desires of those who fear him; he hears their cry and saves them.'"

"At this season, when the time cometh round, thou shalt embrace a son" (2 Kings 4:16), the fruit of thy womb. She said to him: My lord is very old, and the way of women has departed from me, || and it is impossible to do this thing. "Nay, my lord, thou man of God, do not lie unto thine handmaid" (ibid.).