Musannaf Ibn Abi Shayba 19:943

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Abdullah ibn al-Harith al-Hatibi narrated to us, from Hafsa bint Zayd, from Salim ibn Abdullah ibn Umar, regarding the woman who rides the woman: He said: "They shall surely meet Allah while they are both adulteresses."