Numbers 15:30,31

There must have been somewhat particularly heinous in this sin. It is called reproaching the LORD. The HOLY GHOST hath given the best comment upon it by the mouth of his servant David, when he prayed to be kept from presumptuous sin, so that he might be preserved from the great transgression. Psalms 19:13. Perhaps it was similar to the unpardonable sin of blasphemy against the HOLY GHOST. Be it what it may, it stands herein this place as an awful monument in the midst of mercy, for which there remaineth no sacrifice, but a certain fearful looking for of judgment and fiery indignation. Hebrews 10:26.