Arcana Coelestia # 8612
8612. 'Supported his hands' means support supplied to the power of truth engaged in conflict. This is clear from the meaning of 'hands' as power, dealt with in 878, 4931-4937, 7518, 8050, 8153, at this point the power of truth engaged in conflict, represented by 'Joshua', 8595. The reason why support supplied to truth engaged in conflict is meant by Aaron and Hur's supporting Moses' hands is that when Moses' hands were raised up Joshua prevailed.
Arcana Coelestia # 5327
5327. 'And without you shall no man lift up his hand' means that all power in the spiritual was received from the celestial of the spiritual. This is clear from the meaning of 'hand' as power, dealt with in 878, 3387, 4931-4937, 5296. Consequently 'no man lifting up his hand without you' means that they had no power at all except from this, thus that all power rested with this, that is to say, with the celestial of the spiritual. As regards power in the spiritual being meant by 'hand', this will be seen in the next paragraph.