Surah Nuh – Verses 1-3 بِسْمِ اللَّهِ الرَّحْمَٰنِ...
"That you should worship Allah, refrain from disobeying Him, and obey me." As mentioned above, the blessed Chapter in question treats of Noah’s (as) Prophetic call thereby providing those who tread the Path of God Almighty with points of interest concerning calling people unto the Truth, particularly while confronting obdurate peoples.
Opening with Prophethood, the blessed Verse 1 says: "We sent Noah to his people and We said: 'Warn your people before there comes to them an excruciating torment.'" Such excruciating torment may be this worldly or otherworldly. Both kinds of torment are further befitting, though the torments in this world better fit the context herein.
The Prophets (as) were both warners and bearers of glad tidings, but the emphasis laid on warning is owing to the fact that it oftentimes entails stronger effects, in the same way that emphasis is laid on warning and chastisement the world over in order to guarantee law enforcement. According to the second blessed Verse, Prophet Noah (as) was the first Prophet upon whom Divine Scriptures had been revealed and his Prophetic call addressed the world.
Upon receiving Divine Command, he went to his people and said that he was a plain warner to them. The blessed Verse 3 is saying that the goal of his Prophetic call was to urge people to worship God Almighty alone, fear Him, and obey his commands which were Divine Commands. Prophet Noah (as) thus summarized his Prophetic call: worship the One God, Fear Him, Obey His Commands and Injunctions imparted which consisted of doctrines, moral principles, and Divine Law.