всех своих друзей

all one's friends

→ весь
phrase Rare #28,289
all one's friends This phrase is used for an animate plural object in the accusative case. The related form всем своим друзьям means “to all one's friends.” своих is the reflexive possessive meaning “one's own” and refers back to the sentence's subject.
RU: Она пригласила всех своих друзей на день рождения.
EN: She invited all her friends to her birthday party.

Том пригласил всех своих друзей пойти с нами.

Tom invited all his friends to go with us.

В результате Исида лишился всех своих друзей.

As a result, Isida lost all his friends.

— Форма голоса (2016)

Владимир пригласил на вечеринку всех своих друзей.

Vladimir invited all his friends to the party.

Том ниже всех своих друзей.

Tom is shorter than all his friends.