Ramayana
एतछुत्वा तु सङ्क्रुद्धस्तदा वैश्रवणात्मजः । धर्षणां तां परां श्रुत्वा ध्यानं सम्प्रविवेश ह ॥ 7-26-53 ॥
Hearing this, the son of Vaishravana was then greatly enraged; and having heard of that grievous outrage, he entered into meditation.
english translation