Śrīmad-Bhāgavatam 10.72.13
Blended reading (Sanskrit + English inline)
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savyasācinam
—
Arjuna (the ambidextrous archer)
Accusative. Savyasācī — 'one who can draw the bowstring with either hand'. A name that names a martial fact, used here to assign him the toughest direction (north, toward the Himalayan kingdoms).
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vṛkodaram
—
Bhīma (wolf-bellied)
Accusative. The name fits him for the east, where Jarāsandha and Magadha lie — though, as we will see, Jarāsandha is not subdued in this dig-vijaya. He waits for Kṛṣṇa's personal arrangement.
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dakṣiṇasyām
—
to the south
Feminine locative. The south goes to Sahadeva — gentle, scholarly, but assigned the territory that includes Lankā's old kingdoms. Mahābhārata records his success there.
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pratīcyām
—
western
Feminine locative. Nakula takes the west — the direction of Sindhu and the maternal Madra clans. Each brother is matched to the direction his temperament fits.
Sahadeva took with him the Srnjayas. Nakula took the Matsyas, Arjuna took the Kekayas and Bhima took the Madrakas.
This verse describes where he sent them. Out of affection, he sent Sahadeva to the south and Nakula to the west on considering their strength. It was certain they would conquer everyone there and surpass all difficulties, since those places were not difficult to approach and conquer. He sent Arjuna north, because this direction was difficult to cross due to huge mountains, with Gandharvas and devatās difficult to conquer. Arjuna was famous for begin able to draw his bow with the left hand (savyasācinam). In this way he is glorified in the verse. He sent Bhīma to the west, with expectation he would defeat Jarāsandha who was equal to him in strength. In this way he gave orders to them from younger to older, each with successive importance.
Four spokes go out from a single hub. Without the hub the spokes are sticks; with it they wheel across the earth. The four brothers fanning to four directions are spokes; Yudhiṣṭhira at the centre is the hub; Kṛṣṇa is the unmoving axle.
My note
Source: vedabase.io