When they had heard the king, they departed; and, lo, the star, which they saw in the east, went before them, till it came and stood over where the young child was.
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Augustine of Hippo
AD 430
The star had been seen, and with great wonder, nearly two years before. We are to understand that it was signified to them whose the star was, which was visible all that time till He, whom it signified, was born. Then as soon as Christ was made known to them they set out, and came and worshipped Him in thirteen days from the east.