Exodus 32:15

The tables were written on both their sides - If we take this literally, it was certainly a very unusual thing; for in ancient times the two sides of the same substance were never written over. However, some rabbins suppose that by the writing on both sides is meant the letters were cut through the tables, so that they might be read on both sides, though on one side they would appear reversed. Supposing this to be correct, if the letters were the same with those called Hebrew now in common use, the ס samech, which occurs twice, and the final ם mem which occurs twenty-three times in the ten commandments, both of these being close letters, could not be cut through on both sides without falling out, unless, as some of the Jews have imagined, they were held in by miracle; but if this ancient character were the same with the Samaritan, this through cutting might have been quite practicable, as there is not one close letter in the whole Samaritan alphabet. On this transaction there are the three following opinions:

1. We may conceive the tables of stone to have been thin slabs or a kind of slate, and the writing on the back side to have been a continuation of that on the front, the first not being sufficient to contain the whole.

2. Or the writing on the back side was probably the precepts that accompanied the ten commandments; the latter were written by the Lord, the former by Moses; see Clarke's note on Exodus 34:1. See Clarke's note on Exodus 34:27.

3. Or the same words were written on both sides, so that when held up, two parties might read at the same time.

32:15 On both their sides - Some on one table and some on the other, so that they were folded together like a book, to be deposited in the ark.