He (Arjuna) began to offer his respectful obeisances to Krsna again and again, and with faltering voice he began to pray, not as a friend, but as a devotee in wonder. BG 1972 purports

Expressions researched:
"he began to offer his respectful obeisances to Kṛṣṇa again and again, and with faltering voice he began to pray, not as a friend, but as a devotee in wonder"

Bhagavad-gita As it is

BG Chapters 7 - 12

As we have already explained, because of the situation created by the universal form of the Supreme Personality of Godhead, Arjuna became bewildered in wonder; thus he began to offer his respectful obeisances to Kṛṣṇa again and again, and with faltering voice he began to pray, not as a friend, but as a devotee in wonder.

BG 11.35 (1972), Translation and Purport

Sañjaya said to Dhṛtarāṣṭra: O King, after hearing these words from the Supreme Personality of Godhead, Arjuna trembled, fearfully offered obeisances with folded hands and began, falteringly, to speak as follows:

As we have already explained, because of the situation created by the universal form of the Supreme Personality of Godhead, Arjuna became bewildered in wonder; thus he began to offer his respectful obeisances to Kṛṣṇa again and again, and with faltering voice he began to pray, not as a friend, but as a devotee in wonder.