The angels give Mary the glad tidings of the birth of Christ:

“And remember) when the angels said: ‘O Mary! Lo! Allah gives you from Him the glad tidings of a word, whose name is the Messiah, Jesus, son of Mary, illustrious in the world and the Hereafter, and one of those brought near (to Allah). He shall speak to the people in childhood and in maturity. And he shall be (of the company) of the righteous.’ She said: ‘O my Lord! How shall I have a son when no man has touched me?’ He said: ‘Even so: Allah creates what He wills. When He has decreed a plan, He but says to it: 'Be,' and it is!’” (III: 45-47)

The dialogue between Mary and the Holy Spirit:

“Relate in the Book (the story of) Mary, when she withdrew from her family to a place in the East. She placed a screen (to screen herself) from them; then We sent her our angel, and he appeared before her as a man in all respects. She said: ‘I seek refuge in the Most Gracious, that you may be righteous.’ He said: ‘I am the messenger of your Lord, to grant you a pure son.’ She said: ‘How can I have a son, when no man has touched me and I have never been unchaste?’ He said: ‘Thus said your Lord: It is easy for Me. We will render him a sign for the people, and mercy from Us. This is a predestined matter.’” (XIX: 16-21)

Her seclusion from her people when she became manifestly pregnant:

“So she conceived him, and she retired with him to a remote place. And the pains of childbirth drove her to the trunk of a palm-tree. She cried (in her anguish): ‘Ah! Would that I had died before this! Would that I had been a thing forgotten and out of sight!’” (XIX: 22-23)

Mary after the birth of Christ:

“The infant called her from beneath her, saying: ‘Do not grieve. Your Lord has provided you with a stream. If you shake the trunk of this palm tree, it will drop ripe dates for you. So eat and drink and be consoled. And if you meet any mortal, say: ‘Lo! I have vowed a fast to the Beneficent, and that I will not speak today to any mortal.’” (XIX: 24-26)

Her return to her people with her newborn:

“Then she brought him to her own folk, carrying him. They said: ‘O Mary! You have come with an amazing thing. O sister of Aaron! Your father was not a man of evil, nor your mother a woman unchaste!’” (XIX: 27-28)

The infant proves his mother’s innocence through a miracle:

“She pointed to him. They said: ‘How can we talk with an infant in the crib?’ He said: ‘I am a servant of Allah. He has given me the scripture, and has appointed me prophet. And He has made me blessed wherever I am, and has enjoined on me Prayer and Charity as long as I live. And I am to honor my mother. He did not make me a disobedient rebel. And peace be upon me the day I was born, the day I will die, and the day I will get resurrected.’” (XIX: 29-33)

So, Islam proves the innocence of Mary through the miracle of the infant’s speech while he was still in his cradle. Can there be a greater acquittal than this? In contrast we do not find in Christianity what acquits Mary decisively, but the matter is left conjectural and does not reach the degree of the definiteness of her chastity that the Qur’an determines through a miracle. The Jews, on the other hand, accuse her of fornication and claim that the newborn was a bastard.

The Holy Qur’an describes Mary as chaste, obedient to Allah and pure:

“Mary the daughter of ‘Imran, who guarded her chastity; and We breathed into (her body) of Our Spirit; and she testified to the truth of the words of her Lord and of His Revelations, and was one of the devout (servants).” (LXVI: 12)

“And when the angels said: ‘O Mary! Lo! Allah has chosen you and made you pure, and has preferred you above (all) the women of the worlds. O Mary! Worship your Lord devoutly: prostrate yourself, and bow down (in prayer) with those who bow down.” (III: 42-43)

“And (remember) her who guarded her chastity: We breathed into her of Our Spirit, and We made her and her son a sign for all peoples.” (XXI: 91)

That is the image depicted of Mary (may Allah be pleased with her) by the Holy Qur’an.