The Prophet ﷺ was shown the red soil of Karbalāʾ where al-Ḥusayn was killed
The angel of Rain sought permission from the Prophet ﷺ to come, and he was granted permission. He ﷺ said to Umm Salamah, "Guard the door for no one should enter." Then, al-Ḥusayn b. ʿAlī came and leaped until he entered inside. He began to climb upon the Prophet's shoulder, and the angel asked him, "Do you love him?" He ﷺ said, "Yes." The angel then told him, "Your Ummah will kill him. If you wish, I can show you the place where he will be killed." The ˹narrator˺ said that ˹the angel˺ struck with his hand and showed him red soil. Umm Salamah then took that soil and wrapped it in the edge of her garment. The ˹narrator˺ said that "We heard of him being killed in Karbalāʾ."
اسْتَأْذَنَ مَلَكُ الْمَطَرِ أَنْ يَأْتِيَ النَّبِيَّ ﷺ فَأُذِنَ لَهُ فَقَالَ لِأُمِّ سَلَمَةَ «احْفَظِي عَلَيْنَا الْبَابَ لَا يَدْخُلْ أَحَدٌ.» فَجَاءَ الْحُسَيْنُ بْنُ عَلِيٍّ فَوَثَبَ حَتَّى دَخَلَ فَجَعَلَ يَصْعَدُ عَلَى مَنْكِبِ النَّبِيِّ ﷺ فَقَالَ لَهُ الْمَلَكُ: أَتُحِبُّهُ؟ قَالَ النَّبِيُّ ﷺ «نَعَمْ.» قَالَ: فَإِنَّ أُمَّتَكَ تَقْتُلُهُ، وَإِنْ شِئْتَ أَرَيْتُكَ الْمَكَانَ الَّذِي يُقْتَلُ فِيهِ. قَالَ فَضَرَبَ بِيَدِهِ فَأَرَاهُ تُرَابًا أَحْمَرَ فَأَخَذَتْ أُمُّ سَلَمَةَ ذَلِكَ التُّرَابَ فَصَرَّتْهُ فِي طَرَفِ ثَوْبِهَا. قَالَ فَكُنَّا نَسْمَعُ يُقْتَلُ بِكَرْبَلَاءَ.