John Gill's Exposition of the Whole Bible
Isaiah 37:7
Behold, I will send a blast upon him,.... The king of Assyria; a pestilential one, as he afterwards did, which destroyed his army: or,
I will put a spirit into him s; a spirit of fear and dread, which will oblige him to desist from his purposes, and flee; though some interpret it only of an inclination, a will t in him, to return: it may be understood of an angel, a ministering spirit, and be rendered "I will send a spirit against him"; an angelic spirit, as he did, which cut off his army in one night:
and he shall hear a rumour; of the sudden and total destruction of his army; though some refer this to the rumour of the king of Ethiopia coming out to make war against him, Isaiah 37:9, but upon this he did not return to his own land, nor was he slain with the sword, as follows:
and return to his own land; as he did, immediately upon the slaughter of his army by the angel:
and I will cause him to fall by the sword in his own land: as he did, being slain by his own sons, Isaiah 37:37.
s נותן בו רוח "indam ei Spiritum", Junius Tremellius, Piscator. t So Ben Melech explains it by רצון, "will", "desire", "purpose".