Ahle Bait (peace be on them) are the cause of safety and survival for the inhabitants of the earth

قَالَ رَسُولُ اللهِ صَلَّي اللهُ عَلَيْهِ وَ آلِهٖ النُّجُومُ أَمَانٌ لِأَهْلِ السَّمَاءِ وَ أَهْلُ بَيْتِي أَمَانٌ لِأُمَّتِي فَإِذَا ذَهَبَ النُّجُومُ ذَهَبَ أَهْلُ السَّمَاءِ وَ إِذَا ذَهَبَ أَهْلُ بَيْتِي ذَهَبَ أَهْلُ الْأَرْضِ

The Messenger of Allah (peace be on him and his progeny) said:

“Stars are safety for the inhabitants of the sky and my Ahle Bait (peace be on them) are safety for my nation. When the stars perish, the inhabitants of the sky will perish and if my Ahle Bait (peace be on them) perish, the people of the earth will perish.”

Reference:

1.    Al-Amaali of al-Shaikh al-Toosi (r.a.), p. 379, H. 812, 13^th Majlis

2.    Behaar al-Anwaar, vol. 27, p. 309, Chapter 8, H. 3

Notes:

1)    In some narrations, it is mentioned, “…my Ahle Bait (peace be on them) are safety for the people of the earth…”   2)            This narration proves that Ahle Bait (peace be on them) are the cause of the existence of all creatures