Ramayana
तृणबिन्दुस्तु राजर्षिस्तपसा द्योतितप्रभः । ध्यानं विवेश तच्चापि ह्यपश्यदृषिकर्मजम् ॥ 7-2-23 ॥
Now the royal sage Trinabindu, whose radiance was kindled by his austerities, entered into meditation, and he perceived that this too was wrought by the sage's deed.
english translation