The people listened to him in silence. His words were a shock to their stagnating minds, as it is a shock to a person who is asleep under a wall which is about to fall and who is vigorously awakened. This person may be alarmed and may even become angry although the aim was to save him.
Noah's people were divided into two groups after his warning. His words touched the hearts of the weak, the poor, and the miserable and soothed their wounds with its mercy. As for the rich, the strong, the mighty and the rulers, they looked upon the warning with cold distrust. They believed they would be better off if things stayed as they were. Therefore, they started their war of words against Noah.
Related Quran Ayaaths of this Hadith.
Surah 6 : Ayah 84 Surah 4 : Ayah 163 Surah 11 : Ayah 25 Surah 11 : Ayah 32 Surah 11 : Ayah 36 Surah 11 : Ayah 40"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari