From Du Fu's Tang-dynasty poem
《春夜喜雨》 (Welcoming the Spring Night Rain). Full closing couplet:
晓看红湿处,
花重锦官城 - 'at dawn I look where the red is wet; blossoms weigh heavy over the Brocade City.' Written around 761 in Chengdu, where Du Fu was living in his famed thatched cottage (
杜甫草堂).