宵旰忧劳[ xiāo gàn yōu láo ]

⒈ 天不亮就起来，天晚了才进食，辛勤操劳。形容勤于政务。例若不去嵩父子，陛下虽宵旰忧劳，边事终不可为也。——《明史·吴时来传》英travel by night is toilsome;

⒉ 亦作“宵旰焦劳”