Sri Ram’s promise to the demon Vibhishana

सकृदेव प्रपन्नो यस्तवास्मीति च याचते।
अभयं सर्व्वदा तस्मै ददाम्येतद्व्रतं मम ॥४॥
श्रीरामायणे

sakrd eva prapanno yas tavasmiti cha yachate
abhayam sarvada tasmai dadamy etad vratam mama

It is My pledge that if anyone just once sincerely petitions Me for shelter, saying ‘I am Yours,’ then I grant him courage for all time to come.

Sri Ramayana