Canto 2 -
Ayodhyā-kāṇḍa
Chapter 100: Rāma Instructs Bharata About the Duties of a King
Text 2.100.41-4

वीरैरध्युषितां पूर्वमस्माकं तात पूर्वकैः।
सत्यनामां दृढद्वारां हस्त्यश्वरथसंकुलाम्॥

ब्राह्मणैः क्षत्रियैर्वैश्यैः स्वकर्मनिरतैः सदा।
जितेन्द्रियैर्महोत्साहैर्वृतामार्यैः सहस्रशः॥

प्रासादैर्विविधाकारैर्वृतां वैद्यजनाकुलाम्।
कच्चित्सुमुदितां स्फीतामयोध्यां परिरक्षसि॥

vīrair adhyuṣitāṁ pūrvam asmākaṁ tāta pūrvakaiḥ
satya-nāmāṁ dṛḍha-dvārāṁ hasty-aśva-ratha-saṅkulām

brāhmaṇaiḥ kṣatriyair vaiśyaiḥ sva-karma-nirataiḥ sadā
jitendriyair mahotsāhair vṛtām āryaiḥ sahasraśaḥ

prāsādair vividhākārair vṛtāṁ vaidya-janākulām
kaccit sumuditāṁ sphītām ayodhyāṁ parirakṣasi

vīraiḥ = heroes; adhyuṣitām = it was inhabited; pūrvam = in the past; asmākam = by Our; tāta = dear child; pūrvakaiḥ = predecessor; satya-nāmām = so that it is true to its name [in being unassailable]; dṛḍha-dvārām = its gates are sturdy; hasti-aśva-ratha-saṅkulām = and it is crowded with elephants, horses and chariots; brāhmaṇaiḥ = brāhmaṇas; kṣatriyaiḥ = kṣatriyas; vaiśyaiḥ = and vaiśyas; sva-karma-nirataiḥ = because they are absorbed in their specific duties; sadā = always; jita-indriyaiḥ = sense-controlled; mahā-utsāhaiḥ = and greatly enthusiastic; vṛtām = it is filled with; āryaiḥ = honorable; sahasraśaḥ = thousands of; prāsādaiḥ = palaces; vividha-ākāraiḥ = of various shapes; vṛtām = it is filled with; vaidya-jana-ākulām = and packed with learned men; kaccit = do; sumuditām = with happy residents; sphītām = it is a prosperous city; ayodhyām = Ayodhyā; parirakṣasi = You protect.

Dear child, do You protect Ayodhyā so that it is true to its name [in being unassailable]? It was inhabited by Our predecessor heroes in the past. Its gates are sturdy and it is crowded with elephants, horses and chariots. It is filled with thousands of honorable, sense-controlled and greatly enthusiastic brāhmaṇas, kṣatriyas and vaiśyas because they are always absorbed in their specific duties. It is filled with palaces of various shapes and packed with learned men. It is a prosperous city with happy residents.

[Ayodhyā literally means “unassailable.”] How Ayodhyā is unassailable is pointed out above.