Musnad Abu Ya'la al-Mawsili 243:78

And from Abu Musa, that the Prophet, may Allah bless him and grant him peace, said: "A time will surely come when a man will go around with charity of gold, then he will not find anyone to take it from him. And you will see a man followed by forty women, seeking his protection due to the scarcity of men and the abundance of women."