Our signs, i.e. those tokens of God's gracious presence which we and our ancestors formerly used to enjoy; either,
1. Miracles wrought for us, which are called signs, Psalms 78:43, Psalms 135:9. Or,
2. The ordinances of God, the temple, and ark, and sacrifices, and solemn feasts, all which were signs between God and his people. Any prophet: either,
1. Any teacher. We have few or no teachers left to us. Or,
2. Any extraordinary prophet, who can foretell things to come, as the next words explain it. For as for Ezekiel and Jeremiah, they might be dead when this Psalm was composed; and Daniel was involved in civil affairs, and did not teach the people as a prophet; and the prophetical Spirit which sometimes came upon him, and made those great discoveries to him which we read in his book, might possibly at this time suspend his influences. Besides, it is not unusual in Scripture, to say that there is none of a sort of persons or things, when there is a very great scarcity of them. But others make this their great argument, that this Psalm speaks of that persecution in the time of Antiochus, when indeed there was no prophet at all. How long; either,
1. How long their captivity should continue; for though seventy years were determined, yet there might arise doubts among them, as there now are among us, whence they were to be computed, which might make their end uncertain. Or,
2. How long they should lie under reproach, as it follows, Psalms 74:10, which they really did, and might foresee that they should, even after the expiration of their captivity, Nehemiah 1:3.