Lord Nrisimhadeva will always protect us...

Karandhara dasa: In the days when there was no Ratha-yatra held in Los Angeles, the devotees used to travel en masse to San Francisco to attend the Ratha-yatra there. One morning, when Prabhupada came down to the temple at his usual time, there were only a handful of devotees remaining, since most of them had already gone to San Francisco. (Srila Prabhupada was to leave later that day by plane.) Earlier that morning someone had thrown a pipe bomb into the temple room through the back door. The bomb had exploded, shaken the building, and a few devotees had been cut with small pieces of shrapnel. Prabhupada sat on the vyasasana and said he was now going to teach them a new mantra. He then taught the devotees the Nrisimha-deva mantras, beginning with the words namas te narasimhaya.

He went over the words with them several times and then they sang it together. Prabhupada remarked on this occasion that as his movement was now growing, the demons were becoming more envious. He said that as the Krishna consciousness movement grew, there would be attacks, but the devotees should not be afraid and should not stop from pushing on. They should chant these mantras to Lord Nrisimha-deva. "Lord Nrisimha-deva will always protect us," said Prabhupada. Prabhupada also approved that these mantras be sent out to all his ISKCON centers for the devotees to chant.