How do you block certain messages in chat?

I have created a chat command script and it works but I would like to know how to dont show the message in the chat

game.Players.ChildAdded:Connect(function (child)
	child.Chatted:Connect(function (msg)
		if string.sub(msg, 1, 5) == "/kill" then
			child.Character.Humanoid.Health = 0
		end
	end)
end)