It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that Ma'iz al-Aslami (may Allah be pleased with him) came and confessed to adultery before the Prophet (peace and blessings be upon him); then he narrated the full hadith. At the end of it is that when the stones struck him he ran, but he was caught at al-Harrah and struck with a camel's bone, and he died. When the Prophet (peace and blessings be upon him) was told about his running away, he (peace and blessings be upon him) said: "Why did you not leave him!"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحدود / 17000