Valmiki Ramayana Ayodhya Kanda Sarga 32 Shloka 10
Original Shlokaनाग श्शत्रुञ्जयो नाम मातुलोऽयं ददौ मम। तं ते गजसहस्रेण ददामि द्विजसत्तम।।2.32.10।।
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द्विजसत्तम O best among brahmins, अयम् this one, शत्रुञ्जयो नाम by name Satrunjaya, नागः an elephant, मातुलः my maternal uncle, मम to me, ददौ gave, तम् to that (elephant), गजसहस्रेण along with a thousand elephants, ते to you, ददामि I am giving.
I am gifting you, O best among brahmins a thousand elephants including Satrunjaya an elephant my maternal uncle had given me.