In addition...
Verily, the two will never separate until they return to me at the Pond (of Kawthar). As long as you hold fast to them, you will never go astray [11] .” يا أيها الناس إني قد تركت فيكم ما إن أخذتم به لن تضلوا: كتاب الله وعترتي أهل بيتي “O people, I am leaving among you what if you hold firmly unto it, you will never go astray: the Book of Allah and progeny; my household [12] .” From this Hadith (i.e., Hadith Thaqalayn), the Prophet’s household [] is part of two inseparable entities which will prevent the Muslim community from going astray.
Thus, Imam Husain (a.s) is part of the (a.s) whom we are commanded to hold firmly to be saved from perishing. The tradition of the Ark (Hadith-al-Safinah) The Prophet (PBUHH) was reported with different chains of narration to have said: إِنَّمَا مَثَلُ أَهْلِ بَیتِی فِیکُمْ کَمَثَلِ سَفِینَةِ نُوحٍ، مَنْ دَخَلَهَا نَجَی، وَ مَنْ تَخَلَّفَ عَنْهَا غَرِقَ “Surely, the likeness of my household among you is like Noah’s Ark; whoever enters it is safe and whoever remains behind is drowned [13] ”.
From this Hadith (i.e., Hadith Safinah ), the similitude of the Prophet’s household is the similitude of Noah’s Ark (i.e., the Ark of Salvation). Whoever boards it is saved, and whoever is left behind is drowned and destroyed. Thus, Imam Husain (a.s) is part of the (a.s), and whoever follows him is guided and saved, and whoever is left behind is drowned and pushed into hellfire.