What is the authenticity of the hadith: “That the Prophet repeated al-Zalzalah in the two rak'ahs of Fajr”?

Question:
This questioner says: May Allah preserve you. My question is: I heard that it was reported in a hadith from the Prophet (peace and blessings be upon him) that he recited Surat al-Zalzalah and repeated it in two rak'ahs. The question is: Is this established from the Chosen One (peace and blessings be upon him)? In other words, is this hadith authentic, and is it specific to the Prophet (peace and blessings be upon him) or for the general public of his Ummah?

Answer:
The hadith is authentic, and it is not specific to him. He recited al-Zalzalah in Fajr on some nights in the two rak'ahs, so there is no harm in doing that. However, the better practice is what he was consistent in, which is lengthening the Fajr prayer somewhat, such as reciting from the longer surahs of the final part of the Qur'an, or the medium-length surahs of the final part. This is his known Sunnah. Perhaps he recited it rarely to indicate the permissibility.