To be taxed with Mary his espoused wife, being great with child.
Deuteronomy 22:22-27
22
If a man be found lying with a woman married to an husband, then they shall both of them die, both the man that lay with the woman, and the woman: so shalt thou put away evil from Israel.
23
If a damsel that is a virgin be betrothed unto an husband, and a man find her in the city, and lie with her;
24
Then ye shall bring them both out unto the gate of that city, and ye shall stone them with stones that they die; the damsel, because she cried not, being in the city; and the man, because he hath humbled his neighbour's wife: so thou shalt put away evil from among you.
25
But if a man find a betrothed damsel in the field, and the man force her, and lie with her: then the man only that lay with her shall die:
26
But unto the damsel thou shalt do nothing; there is in the damsel no sin worthy of death: for as when a man riseth against his neighbour, and slayeth him, even so is this matter:
27
For he found her in the field, and the betrothed damsel cried, and there was none to save her.
Matthew 1:18
Now the birth of Jesus Christ was on this wise: When as his mother Mary was espoused to Joseph, before they came together, she was found with child of the Holy Ghost.
Matthew 1:19
Then Joseph her husband, being a just man, and not willing to make her a publick example, was minded to put her away privily.