1. Where did Jesus come from?
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Before coming to earth, Jesus lived in heaven. He was an invisible spirit creature.
Birth of Jesus in Quran
“And (mention) when the angels said, ‘O Mary, indeed God has chosen you, purified you, and chosen you above the women of the worlds.’ ‘O Mary, be devoutly obedient to your Lord and prostrate and bow down along those who bow down (in prayer).’ This is a part of the news of the unseen, which We reveal to you (O Muhammad). You were not with them when they cast lots with their pens to (decide) which of them should take care of Mary, nor were you with them when they disputed.” (Quran 3:42-44)
The Good news of a new-born child
“(And mention) when the angels said, ‘O Mary, indeed God gives you the good news of a word from Him, whose name will be the Messiah Jesus, the son of Mary, held in honor in this world and in the Hereafter, and of those who are near to God.’ ‘He will speak to the people in the cradle, and in old age, and he will be of the righteous.’ She said, ‘My Lord, how can I have a son when no man has touched me.’ He said, ‘So (it will be,) for God creates what He wants. When He decides something, He only says to it, ‘Be,’ and it is. And He will teach him the Book and wisdom and the Torah and the Gospel. And (will make him) a messenger to the Children of Israel (saying), ‘Indeed I have come to you with a sign from your Lord. I make for you out of clay the likeness of a bird, then breathe into it, and it becomes a bird by the permission of God. And I heal the blind and the leper, and I bring the dead to life by the permission of God. And I inform you of what you eat and what you store in your houses. Surely, there is a sign for you in that, if you are believers. And (I have come) confirming the Torah that was (revealed) before me, and to allow you some of what was forbidden to you. And I have come to you with a proof from your Lord, so fear God and obey me. Indeed, God is my Lord and your Lord, so worship Him. This is the straight path.” (Quran 3:45-51)
“And mention in the Book (the story of) Mary, when she withdrew from her family to an eastern place. And she placed a screen to seclude herself from them. Then We sent to her Our angel (Gabriel), and he took the form of a well-created man before her. She said, “Indeed I seek refuge with the Most Merciful from you, if you do fear God.”[1] (The angel) said, ‘I am only the messenger of your Lord to give to you (the news of) a pure boy.’ She said, ‘How can I have a son, when no man has touched me (in marriage), and I am not a prostitute?’ He said, So your Lord said, ‘It is easy for Me. And We will make him a sign to people and a mercy from Us. And it is a matter (already) decided.’”[2] (Quran 19:16-21)
The Immaculate Conception
“And she who guarded her chastity, so We breathed (a spirit) into her through Our angel, and We made her and her son (Jesus) a sign for the worlds.”[3] (Quran 21:91)
“Indeed, Jesus is like Adam in front of God. He created him from dust, then said to him, ‘Be,’ and he was.”[5] (Quran 3:59)
“And We made the son of Mary and his mother a sign, And We gave them refuge and rest on a high ground with flowing water.”[6] (Quran 23:50)
https://www.islamreligion.com/articles/621/story-of-jesus-and-mary-in-holy-quran-part-1/