Arcana Coelestia #9597
9597. 'With cherubs' means the Lord's watchfulness, guarding it from the approach of the hells and the harm they can do. This is clear from the meaning of 'cherubs' as watchfulness and providence, preventing any approach to the Lord except through good and protecting from harm the good from the Lord which exists in heaven and with man, dealt with in 9509, consequently guarding heaven from the approach of the hells and the harm they can do.
Isaiah 58:14
14
then you shall delight yourself in Yahweh; and I will make you to ride on the high places of the earth; and I will feed you with the heritage of Jacob your father:" for the mouth of Yahweh has spoken it.