17:19-27 The prophet was to lay before the rulers and the people of Judah, the command to keep holy the sabbath day. Let them strictly observe the fourth command. If they obeyed this word, their prosperity should be restored. It is a day of rest, and must not be made a day of labour, unless in cases of necessity. Take heed, watch against the profanation of the sabbath. Let not the soul be burdened with the cares of this world on sabbath days. The streams of religion run deep or shallow, according as the banks of the sabbath are kept up or neglected. The degree of strictness with which this ordinance is observed, or the neglect shown towards it, is a good test to find the state of spiritual religion in any land. Let all; by their own example, by attention to their families, strive to check this evil, that national prosperity may be preserved, and, above all, that souls may be saved.

21. Take heed to yourselves—literally, "to your souls." Maurer explains, "as ye love your lives"; a phrase used here to give the greater weight to the command.

sabbath—The non-observance of it was a chief cause of the captivity, the number of years of the latter, seventy, being exactly made to agree with the number of Sabbaths which elapsed during the four hundred ninety years of their possession of Canaan from Saul to their removal (Le 26:34, 35; 2Ch 36:21). On the restoration, therefore, stress was especially laid on Sabbath observance (Ne 13:19).

Jerusalem—It would have been scandalous anywhere; but in the capital, Jerusalem, it was an open insult to God. Sabbath-hallowing is intended as a symbol of holiness in general (Eze 20:12); therefore much stress is laid on it; the Jews' gross impiety is manifested in their setting God's will at naught, in the case of such an easy and positive command.