奉和武相公春晓闻莺 〔唐〕许孟容 碧树当窗啼晓莺,间关入梦听难成。碧樹當窓嗁暁鴬,閒關入夢聽難成。千回万啭尽愁思,疑是血魂哀困声。千迴萬囀儘愁思,疑是血魂哀困聲。出处:全唐诗:卷330-10出處:全唐詩:卷330-10