Verse 1.4.106

Sanskrit text, Unicode transliteration, Word-for-word and English translation of verse 1.4.106:

यदा च मां कम् अप्य् अर्थम् उद्दिश्य प्रभुर् आह्वयेत् ।
महानुकम्पया किञ्चिद् दातुं सेवा-सुखं परम् ॥ १०६ ॥

yadā ca māṃ kam apy artham uddiśya prabhur āhvayet |
mahānukampayā kiñcid dātuṃ sevā-sukhaṃ param || 106 ||

However, if sometimes to show special mercy, the Lord for some purpose grants me some happy service, He will call me.

Commentary: Dig-darśinī-ṭīkā with Bhāvānuvāda

(By Śrīla Sanātana Gosvāmī himself including a deep purport of that commentary)

"Thus when Bhagavān so desires, I can go to the house of Pāṇḍavas; that also would be when Lord Śrī Kṛṣṇa calls me for some obligatory purpose. Just as in the Mahābhārata War and so on to alarm the army of the Kauravas, or to show favor to me, that is, grant a slight happiness of service. If He calls me, then I shall at that very moment appear at His lotus feet. He may be in Dvārakā at that time or in Hastināpura, or He may be any place. Or, if someone says His service is very dear to you, what other need can there be for me? Therefore, he is saying that the order of the Lord is my supreme happiness, to fulfill that goal ordered by Him."