What are the authentic hadiths mentioned regarding the virtues of the surahs of the Qur'an, and what is the authenticity of "The Seven Saviors" (Al-Sab' Al-Munajiyat)? And is there an authentic hadith that warns those who memorize the Qur'an or parts of it and then forget it due to not reviewing it?

"What is narrated concerning the virtues of each individual surah (definition) of the Quran is not authentic. Likewise, what is known as 'The Seven Deliverers' has no sound textual basis. Forgetting the Quran after memorizing it is a blameworthy dereliction, and some scholars have considered it among the major sins. However, there is no explicit, authentic hadith (definition) warning against forgetting the Quran; the narrations mentioned in this regard are weak. Furthermore, the hadith of Samurah in Al-Bukhari, which mentions 'rejects the Quran,' does not refer to forgetting but rather to abandoning acting upon it."