(Maryam) 19 : 19
قَالَ إِنَّمَا أَنَا رَسُولُ رَبِّكِ لِأَهَبَ لَكِ غُلَامًا زَكِيًّا
He said: "I am only a Messenger of your Lord to give you a pure boy".
For every mankind, the soul situated in the nape of the father is transferred to the embryo in the mother’s womb in its 4th month through an Angel. Thus by getting the soul the child gets life+ soul (the Spirit-the Rooh) as explained in verse 4: 1. Unlike all other mankind, the Spirit of Jesus is transferred to Maryam through Angel Jibreel from Lord itself as told in verse 66: 12.