He shall spare the poor and needy - He will have pity on; he will show mercy or favor to them.
And shall save the souls of the needy - Will guard and defend them; will be their protector and friend. His administration will have special respect to those who are commonly overlooked, and who are exposed to oppression and wrong.

He shall spare the poor and needy,.... Pity them, have mercy and compassion on them, and sympathize with them; such an one is Christ, a merciful King, as well as High Priest, who is touched with a feeling of his people's infirmities, and who in his love and pity has redeemed them;
and shall save the souls of the needy; not to the exclusion of their bodies, which are also his care and charge, are bought with his blood, are preserved by him, will be raised from the dead, and made like his glorious body; but souls are mentioned as being the most excellent part of man, and which having sinned, are liable to damnation and the second death; and are therefore the special objects of redemption and salvation; these are saved by him from all their sins, and from wrath to come they deserve; hence his name is called "Jesus", a Saviour.