وَلَا تَحْسَبَنَّ الَّذِينَ قُتِلُوا فِي سَبِيلِ اللَّهِ أَمْوَاتًا بَلْ أَحْيَاءٌ عِنْدَ رَبِّهِمْ يُرْزَقُونَ - آل عمران 169
حَدَّثَنَا عَبْدُ اللهِ بْنُ صَالِحٍ، قَالَ: حَدَّثَنَا مُعَاوِيَةُ بْنُ صَالِحٍ، عَنْ رَاشِدِ بْنِ سَعْدٍ، عَنْ يَعْلَى بْنِ مُرَّةَ أَنَّهُ قَالَ: خَرَجْنَا مَعَ النَّبِيِّ صلى الله عليه وسلم، وَدُعِينَا إِلَى طَعَامٍ فَإِذَا حُسَيْنٌ يَلْعَبُ فِي الطَّرِيقِ، فَأَسْرَعَ النَّبِيُّ صلى الله عليه وسلم أَمَامَ الْقَوْمِ، ثُمَّ بَسَطَ يَدَيْهِ، فَجَعَلَ يَمُرُّ مَرَّةً هَا هُنَا وَمَرَّةً هَا هُنَا، يُضَاحِكُهُ حَتَّى أَخَذَهُ، فَجَعَلَ إِحْدَى يَدَيْهِ فِي ذَقْنِهِ وَالأُخْرَى فِي رَأْسِهِ، ثُمَّ اعْتَنَقَهُ فَقَبَّلَهُ، ثُمَّ قَالَ النَّبِيُّ صلى الله عليه وسلم: حُسَيْنٌ مِنِّي وَأَنَا مِنْهُ، أَحَبَّ اللَّهُ مَنْ أَحَبَّ الْحَسَنَ وَالْحُسَيْنَ، سَبِطَانِ مِنَ الأَسْبَاطِ.
Ya'la ibn Murra said, "We went out with the Prophet, may Allah bless him and grant him peace, and we were invited to eat. Husayn was playing in the road and the Prophet, may Allah bless him and grant him peace, raced the people and then spread out his arms. The boy began to run this way and that and the Prophet made him laugh until he caught hold of him. He put one of his hands under his chin and the other on his head and then embraced him. Then the Prophet, may Allah bless him and grant him peace, said, 'Husayn is from me and I am from Husayn. Allah loves anyone who loves al-Hasan and al-Husayn. They are two of my distinguished descendants.'" - Al-Adab Al-Mufrad 364 and also Sunan ibn Majah, Vol. 1, Book 1, Hadith 144
الا ترون الى الحق لا يعمل به والى الباطل لا يتناهى عنه، ليرغب المؤمن في لقاء الله، فاني لا ارى الموت الا سعادة، والحياة مع الظالمين الا برما
Sahid al-Bukhari, Book 23, Hadith 62Sahid al-Bukhari, Book 23, Hadith 62 says that the Prophet Muhammad (PBUH) cried after his son Ibrahim-ibn-Muhammad passed away.