Ibn Jurayj (may Allah have mercy on him) narrates from Ikrimah (may Allah have mercy on him) that a man came to the Prophet (peace and blessings be upon him) and said: I made zihar from my wife and then had intercourse with her before offering the expiation. He (peace and blessings be upon him) asked: "What prompted you?" He said: Her anklets showed on a moonlit night, so I had intercourse with her before offering the expiation. He said: "Refrain from your wife until you have offered the expiation."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الظهار / 15263