The Prophet ﷺ said, "Whoever eats seven Ajwa dates in the morning will not be harmed that day by poison or sorcery."
حدثنا عثمان بن أبي شيبة حدثنا أبو أسامة حدثنا هاشم بن هاشم
عن النبي ﷺ قال من تصبح سبع تمرات عجوة لم يضره ذلك اليوم سم ولا سحر
Bukhari narrated it in the Book of Medicine, chapter on treating magic with ajwa dates, hadith no. 5769, and Muslim narrated it in the Book of Drinks, chapter on the merit of the dates of Madinah, hadith no. 2047, both from the hadith of Abu Usama with this chain.