Canto 3 -
Araṇya-kāṇḍa
Chapter 45: Sītā Chastises Lakṣmaṇa
Text 3.45.21

अनार्याकरुणारम्भ नृशंस कुलपांसन।
अहं तव प्रियं मन्ये रामस्य व्यसनं महत्॥

anāryākaruṇā-rambha nṛśaṁsa kula-pāṁsana
ahaṁ tava priyaṁ manye rāmasya vyasanaṁ mahat

anārya = O uncivilized; akaruṇa-ārambha = one devoid of compassion completely; nṛśaṁsa = O cruel; kula-pāṁsana = defiler of Your family; aham = I; tava = to You; priyam = is pleasing; manye = think that; rāmasya = that has befallen Rāma; vyasanam = calamity; mahat = [this] great.

O uncivilized one completely devoid of compassion!1 O cruel defiler of Your family! I think that [this] great calamity that has befallen Rāma is pleasing to You!

The second half of the verse provides the reason for the first half.

1 Rāmāyaṇa-bhūṣaṇa: akaruṇārambha dayā-prasakti-rahita.