तच्च संस्मृत्य संस्मृत्य रूपमत्यद्भुतं हरेः। विस्मयो मे महान् राजन् हृष्यामि च पुनः पुनः ॥

tach cha sansmṛitya saṁsmṛitya rūpam aty-adbhutaṁ hareḥ vismayo ye mahān rājan hṛiṣhyāmi cha punaḥ punaḥ

Remembering, remembering, also that most marvellous form of Hari, great is my wonder, O King. I rejoice, again and again.

In plain words: Sanjaya says that each time he remembers Krishna's amazing universal form (Hari is a name of Krishna), he is filled with great wonder and keeps rejoicing.