Wa `alaykum as-Salamu wa Rahmatullahi wa Barakatuh.

 

The Hadith is authentic. It is related by Al-Bukhari. Scholars maintained that it refers to the first set up of foundations by Adam and his offspring. Later, the foundations of the Ka`bah have been raised by Abraham while the foundations of Al-Aqsa have been raised by Solomon. The second building of Al-Aqsa has been explained in the Hadith of the Prophet, “When Sulaiman bin Dawud finished building Bait Al-Maqdis, he asked Allah for three things: Judgement that was in harmony with His judgement, and he was given that. And he asked Allah for a dominion that no one after him would have, and he was given that. And when he finished building the Masjid he asked Allah, the Mighty and Sublime, that no one should come to it, intending only to pray there, but he would emerge free of sin as the day his mother bore him.” (Al-Nasa’i)

Allah Almighty knows best.