what's not yours will never be yours (usually used to comfort those who did not get the money that they were expecting) [colloquial]
Definitions (粵典–words.hk)
語句
安慰人嘅説話，例如係爭少少中唔到獎、攞唔到錢嘅時候用，意思係指嗰啲到唔到手嘅錢，其實本身就唔屬於你 literally, "if it is not your money, it won't enter your pocket"; an expression used to comfort people when they fail to receive money they were expecting or hoping to get