Deuteronomy 27:1

Moses with the elders Having in discourses at several times repeated the principal parts of the laws, and made several necessary additions to them, Moses called the council together, and summoned the body of the people to attend them at the tabernacle; where, after an earnest exhortation to observe what he had already said, and was now about to prescribe to them, he directs them, the first opportunity they had after their arrival in the land of promise, to renew their covenant with God in a solemn manner. In order to this they were to write or engrave the chief heads of their law, especially of the moral law, upon large square stones, smoothly plastered over for that purpose, to be audibly read to the whole assembly with the circumstances hereafter appointed. This day This expression signifies not the space of one day, but refers to the whole time of their abode in the plains of Moab.