The Prophet ﷺ said, "Whoever purposely throws himself from a mountain and kills himself, will be in the (Hell) Fire falling down into it and abiding therein perpetually forever; and whoever drinks poison and kills himself with it, he will be carrying his poison in his hand and drinking it in the (Hell) Fire wherein he will abide eternally forever; and whoever kills himself with an iron weapon, will be carrying that weapon in his hand and stabbing his ʿAbdomen with it in the (Hell) Fire wherein he will abide eternally forever."  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ تَرَدَّى مِنْ جَبَلٍ فَقَتَلَ نَفْسَهُ فَهْوَ فِي نَارِ جَهَنَّمَ يَتَرَدَّى فِيهِ خَالِدًا مُخَلَّدًا فِيهَا أَبَدًا وَمَنْ تَحَسَّى سَمًّا فَقَتَلَ نَفْسَهُ فَسَمُّهُ فِي يَدِهِ يَتَحَسَّاهُ فِي نَارِ جَهَنَّمَ خَالِدًا مُخَلَّدًا فِيهَا أَبَدًا وَمَنْ قَتَلَ نَفْسَهُ بِحَدِيدَةٍ فَحَدِيدَتُهُ فِي يَدِهِ يَجَأُ بِهَا فِي بَطْنِهِ فِي نَارِ جَهَنَّمَ خَالِدًا مُخَلَّدًا فِيهَا أَبَدًا  

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