Shaykh Muhammad Saalih al-Farfur (1901-1986) stated in his commentary of the 40 hadiths of Imam Nawawi called Min Mishkat an-Nubuwwah sharh al-Arba’in an-Nawawiyyah (Dar al-Farfur Damascus 2001) that the knowledge of the hour is only known to Allah and nobody else. Under the hadith of Jibril he mentioned after the following statement in the hadith when Jibril asked him about the Hour:
He said, ‘Tell me about the Hour.’ He said, ‘The one asked about it knows no more than the one asking.’
Shaykh Muhammad Saalih al-Farfur said:
أي لا أنا أعلمها ولا أنت تعلمها فهي من مفاتح الغيب لا يعلمها إلا الله وما سأل جبريل عنها وهو يعلم أن غير الله لا يعلمها إلا لينبههم لذلك
“It means: I don’t know about it nor do you know about it. It is from amongst the keys of the unseen. Nobody knows the hour except Allah. Jibril asked about it, and he knew that nobody except Allah knows the Hour, only to inform them about it.” (p. 41)
Know that Shaykh Muhammad Salih al-Farfur is the teacher of several Syrian scholars, such as Ibrahim al-Yaqubi (the father of Muhammad al-Yaqoubi). See:
He studied with Sh. Muhammad Salih al-Farfur ‘Tafsir al-Nasafi’ from the beginning up to Yasin. ‘Sharh Ibn Aqil’ on the Alfiyyah of Ibn Malik, ‘Sharh al-Manar’ of Ibn Malik, ‘Sharh al-Sirajiyyah’, ‘Jawahir al-Balaghah’, ‘Asrar al-Balaghah’, ‘Al-Kamil’ of al-Mubrad, ‘Tadrib al-Rawi’, ‘Risalah al-Qushayriyyah’ and attended his morning lessons on the ‘Hashiyah Ibn Abidin’, ‘Sahih al-Tirmidhi’, ‘Al-Minan al-Kubra’, ‘Sharh al-Hikam’ of Ibn Ajibah, ‘Al-Yawaqit wal-Jawahir’ and around 8 volumes from ‘Umdah al-Qari’ of al-Aini. In addition he attended his evening lessons on ‘Sharh al-Qutb al-Razi ala al-Shamsiyyah’ on logic (mantiq) by Najm al-Din al-Katibi, ‘Hashiyah al-Adawi ala Khulasah al-Hisab’ of al-Amili, ‘Hashiyah al-Bajuri ala al-Jawharah’ a number of times, ‘Sharh al-Musayarah’ of Ibn Abi Sharif. He attended after after the Asr prayer in his home the ‘Tafsir al-Kashaf’ of al-Zamakhshari and ‘Dalail al-Ijaz’ and was granted a written ijazah by him.
He had other famous students such as Shaykh Adib Kallas, Shaykh ‘Abdur Razzaq al-Halabi, Shaykh Shu’ayb and ‘Abdul Qadir al-Arna’ut, Shaykh Suhayl az-Zabibi and others. He was the founder of the famous institute Ma’ad al-Fath al-Islami in Damascus.