Sa'id bin al-Musayyib (may Allah have mercy on him) was asked about a man who married but did not have intercourse with his wife, and then committed adultery. He said: The Sunnah in this case is that he be flogged and not stoned.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحدود / 16945