As well as the Bishops. No mention is made of a proving of the Bishops, but this may be fairly assumed. Comp. not a novice, 1Ti 3:6.
Be proved (δοκιμαζέσθωσαν)
Common in Paul; only here in Pastorals. See on 1Pe 1:7. Not implying a formal examination, but a reference to the general judgment of the Christian community as to whether they fulfil the conditions detailed in 1Ti 3:8. Comp. 1Ti 5:22; 2Ti 2:2.
Let them use the office of a deacon (διακονείτωσαν)
Much better, let them serve as deacons. In this sense only in the Pastorals. Comp. 1Ti 3:13. The verb is very common in N.T.
Being blameless (ἀνέγκλητοι ὄντες)
Rather, unaccused: if no charge be preferred against them. In Paul, 1Co 1:8; Col 1:22. Comp. Tit 1:6, Tit 1:7. It is a judicial term. The participle ὄντες signifies provided they are.