I heard Messenger of Allah ﷺ saying, "Whoever takes seven 'Ajwa dates in the morning will not be effected by magic or poison on that day."
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَنِ اصْطَبَحَ بِسَبْعِ تَمَرَاتٍ عَجْوَةٍ لَمْ يَضُرَّهُ ذَلِكَ الْيَوْمَ سَمٌّ وَلاَ سِحْرٌ