The whole poem:
黄梅时节家家雨,
青草池塘处处蛙。
有约不来过夜半,
闲敲棋子落灯花。 'In plum-rain season it rains on every house; by every green pond the frogs call. The friend I asked has not come, and it is past midnight; idly I tap the chess pieces, and the charred wick drops from the lamp.'
赵师秀 (1170–1219) was one of the Four Lings of Yongjia, a group of Southern Song poets.