John Gills Exposition of the Bible Commentary - Exodus 31:13
Speak thou also unto the children of Israel ,.... Notwithstanding all that has been said and ordered concerning making the tabernacle and all things belonging to it; yet this was not to be understood to the violation of the sabbath, or the neglect of that, in which no work was to be done, no, not any relating to the tabernacle and the vessels of it; and though that was to be made, and everything belonging to it, as soon as possible, yet the sabbath was to be observed, and not broken on that... read more
Matthew Henry's Complete Commentary - Exodus 31:12-18
Here is, I. A strict command for the sanctification of the sabbath day, Exod. 31:13-17. The law of the sabbath had been given them before any other law, by was of preparation (Exod. 16:23); it had been inserted in the body of the moral law, in the fourth commandment; it had been annexed to the judicial law (Exod. 23:12); and here it is added to the first part of the ceremonial law, because the observance of the sabbath is indeed the hem and hedge of the whole law; where no conscience is made... read more