Bhagavad Gita Chapter 18, Verse 77

तच्च संस्मृत्य संस्मृत्य रूपमत्यद्भुतं हरेः | विस्मयो मे महान्राजन्हृष्यामि च पुनः पुनः ||

tac ca saṁsmṛtya saṁsmṛtya rūpam atyadbhutaṁ hareḥ vismayo me mahān rājan hṛṣyāmi ca punaḥ punaḥ

And remembering again and again that most wonderful form of Hari, great wonder arises in me, O King, and I rejoice again and again.

Sanjaya describes his experience of seeing Krishna's universal form. 'Tac ca saṁsmṛtya saṁsmṛtya rūpam atyadbhutaṁ hareḥ'—and (ca) remembering again and again (saṁsmṛtya saṁsmṛtya) that most wonderful form (atyadbhutam rūpam) of Hari (hareḥ), that (tat). 'Vismayo me mahān rājan hṛṣyāmi ca punaḥ punaḥ'—great wonder (mahān vismayaḥ) arises in me (me), O King (rājan), and (ca) I rejoice (hṛṣyāmi) again and again (punaḥ punaḥ). This refers to Sanjaya's experience of witnessing Krishna's universal form (described in Chapter 11). Every time he remembers that most wonderful form of the Supreme, great wonder arises in him, and he rejoices repeatedly. This reveals the profound impact of seeing the Supreme's universal form—it brings great wonder and joy every time it's remembered.