Neh 9:3

“And they stood up in their place,.... In the outward court of the temple, where men used to stand when they prayed and confessed their sins: and read in the book of the law of the Lord their God; that they might the better know the mind and will of God, and do their duty: this they did one fourth part of the day; the space of three hours, from sun rising, or six o'clock in the morning, to the time of the morning sacrifice, which was about nine o'clock: and another fourth part they confessed; the goodness of God to them, and the sins they had been guilty of: and worshipped the Lord their God; bowed down before him in prayer and supplication, and so spent three hours more, which reached to noon or twelve o'clock; and from thence to three o'clock, about the time of the evening sacrifice, and from thence to sun setting, or six o'clock, and so spent the whole day in the above exercises alternately.”

“One fourth part of the day - As they did no manner of work on this day of fasting and humiliation, so they spent the whole of it in religious duties. They began, says Calmet, on the first hour, and continued these exercises to the third hour; from the third they recommenced, and continued till the sixth hour; from the sixth to the ninth; and from the ninth, to the twelfth or last hour. 1. They heard the law read, standing; 2. They prostrated themselves, and confessed their sins; 3. They arose to praise God for having spared and dealt thus mercifully with them.”

“Stand, to hear the law, out of reverence; (Menochius) or the Levites ascended the pulpit to read, four times in the day. (Tirinus) — After each lecture psalms were sung, (Calmet) to praise God, and to declare the sins of the people, and their sincere repentance. (Haydock) — On days of mourning, the Jews assembled four times to pray, and thrice on other days, by the institution of Esdras. (Maimonides) See Acts iii. 1. — On their fasts, they refrained from all meat, as well as from work, spending their time in prayer. They began at the first hour, and continued their exercises of devotion till the third, when they recommenced for other three hours. They did the like at the sixth and ninth hours; hearing the law, then prostrating themselves to confess their sins. Afterwards they rose to join with the Levites in praising the Lord. (Calmet)”

“they . . . read in the book of the law--Their extraordinary zeal led them to continue this as before. one fourth part of the day--that is, for three hours, twelve hours being the acknowledged length of the Jewish day (Joh 11:9). This solemn diet of worship, which probably commenced at the morning sacrifice, was continued for six hours, that is, till the time of the evening sacrifice. The worship which they gave to the Lord their God, at this season of solemn national humiliation, consisted in acknowledging and adoring His great mercy in the forgiveness of their great and multiplied offenses, in delivering them from the merited judgments which they had already experienced or which they had reason to apprehend, in continuing amongst them the light and blessings of His word and worship, and in supplicating the extension of His grace and protection.”