'Thus' in the Bible

And they said unto him, In Bethlehem of Judaea: for thus it is written by the prophet,

And Jesus answering said unto him, Suffer it to be so now: for thus it becometh us to fulfil all righteousness. Then he suffered him.

And honour not his father or his mother, he shall be free. Thus have ye made the commandment of God of none effect by your tradition.

But how then shall the scriptures be fulfilled, that thus it must be?