Isaiah 62:6

The Lord revealed that He had appointed watchmen, whose job it was to remind Him of His promises to Israel, so that He would not forget them (cf. Isaiah 36:3; 2 Samuel 8:16; 1 Kings 4:3; Luke 2:36-38). Obviously the Lord does not forget His promises, but this assurance, in the language of the common practice of the day, underscored the fact that He would not forget. The watchmen in view may be angels and or human intercessors (cf. Ezekiel 33; Daniel 4:13; Luke 11:5-10; Luke 18:1-8).