John Lightfoot on Luke 1:29

[Was troubled, &c.] I. It was very rare and unusual for men to salute any women; at least if that be true in Kiddushin. Rabh Judah, the president of the academy of Pombeditha, went to Rabh Nachman, rector of the academy of Neharde, and after some talk amongst themselves, "Saith Rabh Nachman, Let my daughter Doneg bring some drink, that we may drink together. Saith the other, Samuel saith, We must not use the ministry of a woman. But this is a little girl, saith Nachman. The other answers, But Samuel saith, We ought not to use the ministry of any woman at all. Wilt thou please, saith Nachman, to salute Lelith my wife? But, saith he, Samuel saith, The voice of a woman is filthy nakedness. But, saith Nachman, thou mayest salute her by a messenger. To whom the other; Samuel saith, They do not salute any woman. Thou mayest salute her, saith Nachman, by a proxy her husband. But Samuel saith, saith he again, They do not salute a woman at all."

II. It was still much more rare and unusual to give such a kind of salutation as this, Hail, thou that art highly favoured, by which title Gabriel had saluted Daniel of old: with this exception, that it was terror enough so much as to see an angel.