Haskell: Get all digits in given string

Write a function, which takes a string (it contains characters, numbers, special symbols etc.,) as input and return all the numbers in the string.

getNumbers list = [x | x <- list, isDigit x]

Above snippet extract all the numbers in given string.

Prelude> import Data.Char
Prelude Data.Char> 
Prelude Data.Char> let getNumbers list = [x | x <- list, isDigit x]
Prelude Data.Char> 
Prelude Data.Char> getNumbers "12HAbsja123nkasn8382"
"121238382"

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