Question Summary:
Story of a peacock being banished from Jannah because of its boastfulness

Question Detail:

Maulana/Mufti, a friend told me that she once heard a story of a peacock being banished from Jannah because of its boastfulness.

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.

As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.

To the best of our knowledge there is no authentic narration on this.

And Allah Ta’āla Knows Best

Muhammad Yusuf bin Moulana Abdur Rahim Khan

Student Darul Iftaa
Chatsworth, Durban, KZN, South Africa 

Checked and Approved by,
Mufti Ebrahim Desai.