Musnad Ahmad 1159:6

Rawh narrated to us, he said: Al-Awza'i narrated to us, from Hassan ibn Atiyyah, who said: When death descended upon 'Anbasah ibn Abi Sufyan, his distress became severe. It was said to him: "What is this distress?" He said: "I heard Umm Habibah—meaning his sister—saying: The Messenger of Allah (ﷺ) said: 'Whoever prays four [rak'ahs] before the Dhuhr prayer and four after it, Allah will forbid his flesh to the Fire.' I have not abandoned them since I heard them."