Philipper 4:22

they that are of CÃ&brvbrsar's household--the slaves and dependents of Nero who had been probably converted through Paul's teaching while he was a prisoner in the PrÃ&brvbrtorian barrack attached to the palace. Philippi was a Roman "colony," hence there might arise a tie between the citizens of the mother city and those of the colony; especially between those of both cities who were Christians, converted as many of them were by the same apostle, and under like circumstances, he having been imprisoned at Philippi, as he now is at Rome.

Exhortations to several Christian duties, as stedfastness, unanimity, joy, etc. (Phi 4:1-9). The apostle's grateful acknowledgments of the Philippians' kindness to him, with expressions of his own content, and desire of their good (Phi 4:10-19). He concludes the epistle with praise, salutations, and blessing (Phi 4:20-23).

4:22 Those in Caesar’s household were believers employed in the service of the Roman government—perhaps those whom Paul had evangelized while in prison. They might have been especially close to Paul and concerned for him in prison (see 1:13).