the day that you stood before the LORD your God in Horeb, when the LORD said to me, “Assemble the people to me, and I will make them hear my words, that they may learn to fear me all the days that they live on the earth, and that they may teach their children.”
The day you stood before the LORD your God at Horeb (note: That is, Mount Sinai, or possibly a mountain in the range containing Mount Sinai; also in verse 15), the LORD said to me, “Gather the people before Me to hear My words, so that they may learn to fear Me all the days they live on the earth, and that they may teach them to their children.”