Yahya related to me from Malik from Ibn Shihab from Salim ibnAbdullah that his father Abdullah ibn Umar used to say, "A man'skissing his wife and fondling her with his hands are part ofintercourse. Someone who kisses his wife or fondles her with his handmust do wudu."
USC-MSA web (English) reference: Book 2, Hadith 66
Arabic reference: Book 2, Hadith 96