Mohammed said, "I was shown the Hell-fire and that the majority of its dwellers are women."
This hadith can be found in:-
SaHeeH Bukhari: 29, 304, 1052, 1462, 3241, 5197, 5198, 6449, 6546 (FatH Al-Bari's numbering system)
SaHeeH Muslim: 80, 885, 907, 2737, 2738 (Abd Al-BaQi's numbering system)