Musnad Ahmad 1119:38

Muhammad ibn Bakr narrated to us, he said: An-Nahhas informed us, from Shaddad Abu ‘Ammar, from ‘Awf ibn Malik, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no Muslim servant who has three daughters, and he spends upon them until they marry or die, except that they will be a veil for him from the Fire." A woman said: "O Messenger of Allah, or two?" He said: "Or two."