Sahih Muslim | Book 23 | Hadith Number 5080

Narrated by Amir b. Sa'd b. Abu Waqqas, on the authority of his father,
Amir b. Sa'd b. Abu Waqqas, on the authority of his father, reported Allah's Messenger (may peace be upon him) having said: He who ate seven dates (of the land situated) between these two lava plains in the morning, no poison will harm him until it is evening.