Old form of to (4)

I believe the answer is:

unto

(Other definitions for unto that I've seen before include "Heading for" , "'Do ... others, etc.'" , "Biblical preposition, the archaic 'to'" , "'''For ... us a child is born'' (Handel's Messiah) (4)'" , "Archaic form of to" .)

I've seen this clue in The Times.

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