Anaesthetics in the Bible? (7)

I believe the answer is:

numbers

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'anaesthetics' is the definition.
(things that make things numb)

I don't understand how the remainder of the clue works.

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(Other definitions for numbers that I've seen before include "Fourth book of the Bible" , "Amounts; songs, etc" , "anaesthetists?" , "Amounts; counts" , "They subdue the pain" .)

I've seen this clue in The Irish Independent.

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