Ramayana
न संतापं महाबाहो मदर्थं कर्तुमर्हसि । पूर्वनिर्माणबद्धा हि कालस्य गतिरीदृशी ॥ 7-106-2 ॥
"You ought not to grieve on my account, O mighty-armed one; for the course of Time, bound by what was fashioned beforehand, is of such a nature."
english translation