Valmiki Ramayana Bala Kanda Sarga 54 Shloka 11
Original Shlokaइयमक्षौहिणी पूर्णा सवाजिरथसङ्कुला। हस्तिध्वजसमाकीर्णा तेनासौ बलवत्तर:।।1.54.11।।
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सवाजिरथसङ्कुला crowded with horses yoked to chariots, हस्तिध्वजसमाकीर्णा surrounded by elephants and banners, इयम् this, अक्षौहिणी Akshauhini, पूर्णा is filled, तेन for that reason, असौ this (king ), बलवत्तर: is mighty.
He has an entire akshauhini composed of horses, chariots, elephants and banners. Hence he is stonger".