There was a monk from Sichuan named Xianzhen, also known as Xigui. Before he took vows, he long headed a county as its magistrate. He killed many bandits during this time. Not long after becoming a monk, he lived in Wulei Monastery at Cixi in the city of Ningbo.

Every night, he dreamt that a pack of angry bandits, bloody and disfigured, was trying to kill him with a host of weapons. He was gripped by panic.

As a result, he resolved to recite the name of Amitabha Buddha exclusively, day and night. He became so proficient at his practice that he could recite even while dreaming.

When encountered the bandits again in a dream, he recited Amitabha’s name and persuaded his antagonists to do so as well. They gradually became pacified. After a few months, the bandits disappeared from his dreams.

I shared Xianzhen’s quarters for the longest time. He often told me his stories and praised the inconceivable merits and virtues of Amitabha-recitation.

(From Pure Land Buddhism: Questions and Answers, by Master Hongyi)

Remarks:

A single ray is enough to light up a long-dark chamber;
A single command from a Buddha suffices to dispel all ghosts and demons.
The single-minded and exclusive recitation of Amitabha’s name
Disperses resentments and enables rebirth in the Pure Land.
Amber can trap dust and magnets attract iron.
Our evil karma is like dust and iron,
While Amitabha’s name is akin to amber and magnets. 
We should keep this in mind, and recite his name often.

– English translation by Householder Guoshu,
Edited by Householder Jingtu