Srimad Bhagavatam Canto 04, Chapter 14, Text 32

SB 4.14.32

nayam arhaty asad-vrtto
naradeva-varasanam
yo ’dhiyajña-patim visnum
vinindaty anapatrapah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The saintly sages continued: This impious, impudent man does not deserve to sit on the throne at all. He is so shameless that he even dared insult the Supreme Personality of Godhead, Lord Visnu.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
One should not at any time tolerate blasphemy and insults against Lord Visnu or His devotees. A devotee is generally very humble and meek, and he is reluctant to pick a quarrel with anyone. Nor does he envy anyone. However, a pure devotee immediately becomes fiery with anger when he sees that Lord Visnu or His devotee is insulted. This is the duty of a devotee. Although a devotee maintains an attitude of meekness and gentleness, it is a great fault on his part if he remains silent when the Lord or His devotee is blasphemed.
Srimad Bhagavatam Canto 04, Chapter 14, Text 30
Srimad Bhagavatam Canto 04, Chapter 14, Text 33