One of the researchers of this book stated that it is valid in our time to say "Allah and His Messenger know best" regarding what is from the revelation!
Machine translationRead the Arabic original
The questioner:
Honorable Shaykh, may Allah grant you success. He says: One of the researchers of this book commented on the phrase "Allah and His Messenger know best," saying: "As for in our time, it is valid to say 'Allah and His Messenger know best' regarding what is from the revelation, but as for what is other than that, it is not sufficient."
The Shaykh:
You do not attribute this to the revelation; you attribute it to the Messenger. So after the death of the Messenger, one does not say "Allah and His Messenger"; one says "Allah knows best."
The presenter:
Honorable Shaykh, may Allah grant you success.
The Shaykh:
Even if we concede that some of the comments are made out of ignorance rather than knowledge. Yes.
Honorable Shaykh, may Allah grant you success. He says: One of the researchers of this book commented on the phrase "Allah and His Messenger know best," saying: "As for in our time, it is valid to say 'Allah and His Messenger know best' regarding what is from the revelation, but as for what is other than that, it is not sufficient."
The Shaykh:
You do not attribute this to the revelation; you attribute it to the Messenger. So after the death of the Messenger, one does not say "Allah and His Messenger"; one says "Allah knows best."
The presenter:
Honorable Shaykh, may Allah grant you success.
The Shaykh:
Even if we concede that some of the comments are made out of ignorance rather than knowledge. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، [259 -939] قال أحد محققي هذا الكتاب أنه يصح في زماننا أن نقول "الله ورسوله أعلم" فيما كان من الوحي! — youtube.com
The Arabic text is a machine transcription of the audio recording.