As I gaze upon the cuckoo, who continues his plaintive cry, only the moon remains to light the dawn (the 161st verse in the summer section of 'Senzai wakashu' (Collected Waka of 1000 Years)).
ほととぎす　鳴きつる方を　ながむれば　ただ有明の　月ぞ残れる（「千載和歌集」夏161）