Ramayana
तं जीवयथ भद्रं वो नानृतं कर्तुमर्हथ । द्विजस्य संश्रुतो ऽर्थो मे जीवयिष्यामि ते सुतम् ॥ 7-76-12 ॥
Restore him to life; blessings be upon you, for you ought not to make my word untrue. For a promise was given by me to the Brahmana, and so I shall bring your son back to life.
english translation