Psalms 81:3

Blow up the trumpet - שופר shophar, a species of horn. Certainly a wind instrument, as the two last were stringed instruments. Perhaps some chanted a psalm in recitativo, while all these instruments vere used as accompaniments. In a representative system of religion, such as the Jewish, there must have been much outside work, all emblematical of better things: no proof that such things should be continued under the Gospel dispensation, where outsides have disappeared, shadows flown away, and the substance alone is presented to the hearts of mankind. He must be ill off for proofs in iavour of instrumental music in the Church of Christ, who has recourse to practices under the Jewish ritual.

The feast of the new moon was always proclaimed by sound of trumpet. Of the ceremonies on this occasion I have given a full account in my Discourse on the Eucharist. For want of astronomical knowledge, the poor Jews were put to sad shifts to know the real time of the new moon. They generally sent persons to the top of some hill or mountain about the time which, according to their supputations, the new moon should appear. The first who saw it was to give immediate notice to the Sanhedrin; they closely examined the reporter as to his credibility, and whether his information agreed with their calculations. If all was found satisfactory, the president proclaimed the new moon by shouting out מקדש mikkodesh! "It is consecrated." This word was repeated twice aloud by the people; and was then proclaimed every where by blowing of horns, or what is called the sound of trumpets. Among the Hindoos some feasts are announced by the sound of the conch or sacred shell.

Blow up the trumpet - The word rendered blow means to make a clangor or noise as on a trumpet. The trumpet was, like the timbrel, the harp, and the psaltery, a common instrument of music, and was employed on all their festive occasions. It was at first made of horn, and then was made similar in shape to a horn. Compare Joshua 6:5; Leviticus 25:9; Job 39:25.

In the new moon - On the festival held at the time of the new moon. There was a high festival on the appearance of the new moon in the month of Tisri, or October, which was the beginning of their civil year, and it is not improbable that the return of each new moon was celebrated with special services. See the notes at Isaiah 1:13; compare 2 Kings 4:23; Amos 8:5; 1 Chronicles 23:31; 2 Chronicles 2:4. It is not certain, however, that the word used here means new moon. Prof. Alexander renders it in the month; that is, in the month, by way of eminence, in which the passover was celebrated. The word used - חדשׁ chôdesh - means, indeed, commonly the new moon; the day of the new moon; the first day of the lunar month Numbers 29:6; 1 Samuel 20:5, 1 Samuel 20:18, 1 Samuel 20:24; but it also means a month; that is, a lunar month, beginning at the new moon, Genesis 8:5; Exodus 13:4; et al. The corresponding or parallel word, as we shall see, which is rendered in our version, in the time appointed, means full moon; and the probability is, as Professor Alexander suggests, that in the beginning of the verse the month is mentioned in general, and the particular time of the month - the full moon - in the other part of the verse. Thus the language is applicable to the passover. On the other supposition - the supposition that the new moon and the full moon are both mentioned - there would be manifest confusion as to the time.

In the time appointed - The word used here - כסה keseh - means properly the full moon; the time of the full moon. In Syriac the word means either "the first day of the full moon," or "the whole time of the full moon." (Isa Bar Ali, as quoted by Gesenius, Lexicon) Thus, the word means, not as in our translation, in the time appointed, but at the full moon, and would refer to the time of the Passover, which was celebrated on the fourteenth day of the lunar month; that is, when the moon was at the full. Exodus 12:6.

On our solemn feast day - Hebrew, In the day of our feast. The word solemn is not necessarily in the original, though the day was one of great solemnity. The Passover is doubtless referred to.