11.50

संजय उवाच
इत्यर्जुनं वासुदेवस्तथोक्त्वा
स्वकं रूपं दर्शयामास भूयः ।
आश्वासयामास च भीतमेनं
भूत्वा पुनः सौम्यवपुर्महात्मा ॥५०॥

sañjaya uvāca
ity arjunaḿ vāsudevas tathoktvā
svakaḿ rūpaḿ darśayām āsa bhūyaḥ
āśvāsayām āsa ca bhītam enaḿ
bhūtvā punaḥ saumya-vapur mahātmā

sañjayaḥ uvāca — Sañjaya said; iti — thus; arjunam — unto Arjuna; vāsudevaḥ — Kṛṣṇa; tathā — in that way; uktvā — speaking; svakam — His own; rūpam — form; darśayām āsa — showed; bhūyaḥ — again; āśvāsayām āsa — encouraged; ca — also; bhītam — fearful; enam — him; bhūtvā — becoming; punaḥ — again; saumya- vapuḥ — the beautiful form; mahā- ātmā — the great one.

Text

Sanjaya said to Dhritarashtra: The Supreme Personality of Godhead, Krishna, having spoken thus to Arjuna, displayed His real four-armed form and at last showed His two-armed form, thus encouraging the fearful Arjuna.

Purport

When Krishna appeared as the son of Vasudeva and Devaki, He first of all appeared as four-armed Narayana, but when He was requested by His parents, He transformed Himself into an ordinary child in appearance. Similarly, Krishna knew that Arjuna was not interested in seeing a four-handed form, but since Arjuna asked to see this four-handed form, Krishna also showed him this form again and then showed Himself in His two-handed form. The word saumya-vapuh is very significant. Saumya-vapuh is a very beautiful form; it is known as the most beautiful form. When He was present, everyone was attracted simply by Krishna's form, and because Krishna is the director of the universe, He just banished the fear of Arjuna, His devotee, and showed him again His beautiful form of Krishna. In the Brahma-samhita (5.38) it is stated, premanjana-cchurita-bhakti-vilocanena: only a person whose eyes are smeared with the ointment of love can see the beautiful form of Sri Krishna.

Bhagavad Gita As It Is.

Chapter 11: The Universal Form. Text 50

Sanjaya said to Dhritarashtra: The Supreme Personality of Godhead, Krishna, having spoken thus to Arjuna, displayed His real four-armed form and at last showed His two-armed form, thus encouraging the fearful Arjuna.