C. F. Keil and Franz Delitzsch on Nehemiah 1:6

Neh 1:6 “Let Thine ear be attentive, and Thine eyes open,” like 2Ch 6:40; 2Ch 7:15 - לשׁמע, that Thou mayest hearken to the prayer of Thy servant, which I pray, and how I confess concerning ... מתדּה still depends upon אשׁר in the sense of: and what I confess concerning the sins. היּום does not here mean to-day, but now, at this time, as the addition “day and night” compared with ימים in Neh 1:4 shows. To strengthen the communicative form לך חטאנוּ, and to acknowledge before God how deeply penetrated he was by the feeling of his own sin and guilt, he adds: and I and my father’s house have sinned.