Allah (عَزَّ وَجَلَّ) is the teacher of Prophet Mohammad (صلى الله عليه و آله وسلم), and the Prophet (صلى الله عليه و آله وسلم) is the teacher of humanity. Thus, the expanse of the chest (knowledge) of Prophet Mohammad (صلى الله عليه و آله وسلم) is indeed limitless and it is from the beginning of the time.

(i) It is in Hadith - Jabir Ibn Abdullah (رضئ اللہ تعالی عنہ) asked the Prophet (صلى الله عليه و آله وسلم), O' Apostle of Allah (صلى الله عليه و آله وسلم) may my father and mother be sacrificed for you, tell me the first thing Allah (عَزَّ وَجَلَّ) created before all things.' The Prophet (صلى الله عليه و آله وسلم) said : O'Jabir (رضئ اللہ تعالی عنہ), the first thing Allah (عَزَّ وَجَلَّ) created was the light of your Prophet (صلى الله عليه و آله وسلم) from His light. (And everything else was created from that light). (Part of the Hadith).

The above Hadith was narrated by Abdur Razzaq (d. 211 AH) in his Musannaf according to Qastallani in al-Mawahib al-Laduniyya (1:55) and Zarqani in his Sahrh al-Mawahib (1:56 of the Matba'a al-Amira, Edn, Cairo).

Abdur Razzaq is one of the authentic and reliable narrators. Bukhari took 120 and Muslim took 400 Ahadith from him.

Baihaqi narrated the above Hadith with a different wording in 'Dala'il al-Nubawwa, according to Zurqani in his Sharh al-Mawahib (1:56 of the Matba'a al-Amira, Cairo.) Diyarbakri narrated it in 'Tarikh al-Khamis (1-20).

(ii) It is in Quran – يَا أَيُّهَا النَّبِيُّ إِنَّا أَرْسَلْنَاكَ شَاهِدًا وَمُبَشِّرًا وَنَذِيرًا - وَدَاعِيًا إِلَى اللَّهِ بِإِذْنِهِ وَسِرَاجًا مُّنِيرًا [ O'Prophet (صلى الله عليه و آله وسلم) Truly We have sent you as a Witness, a Bearer of Glad tidings and a Warner (for the entire cosmos); and one who invites to Allah's (grace) by His consent, and as a lamp spreading light (into the whole cosmos). (Al-Ahzaab 45-46)

In the above verse Prophet Mohammad (صلى الله عليه و آله وسلم) is described as 'Lamp spreading light' (into the whole cosmos). He is also referred as a 'Witness', a bearer of glad tidings and the one who warns to humanity. A witness is the one who knows about all the physical and spiritual aspects of this Cosmos.

(iii) It is in Hadith - Abu Hurairah (رضئ اللہ تعالی عنہ) narrated, 'they (the Sahabah) asked, O'Allah's Apostle (صلى الله عليه و آله وسلم), when was prophet-hood established for you? He said, while Adam (عليه السلام) was between the soul and body' (Tirmidhi).