Kokinshu 1009 - "Hatsuse River"

1009 Hatsuse River— Where ancient waters flow Beside the two-trunk tree When years have passed I hope we’ll meet again Beside the two-trunk tree
はつせ河ふるかはのべにふたもとあるすぎ年をへて又もあひ見むふたもとあるすぎ	Haru sareba Nobe ni mazu saku Miredo akanu hana Mainashi ni Tada nanoru beki Hana no na nare ya

Author unknown. The two-trunk cedar tree, the pairing with the ancient river, and the repetition all symbolize and reinforce the couple’s enduring love.