One receives the cup of blessing with two hands, and, when one begins blessing, one should lift it up with one's right hand without assisting it with one's left hand. Rema: And this [practice to not use one's left hand in elevating the cup of blessing] is specifically so that the left hand should not touch the cup; but, if one places the left hand beneath the right hand to help it, that is permissible. And one should elevate it a fistbreadth from the ground if one was sitting on the ground. And if one was lounging at a table, one elevates it above the table a fistbreadth. And one sets one's eyes upon it, so as not to lose mindfulness about it. Rem"a: And, therefore [since one should place one's eyes upon the cup], one should not buy a cup - called a glueck - whose lip is thin, to bless upon it. And he sends it to one's wife so that she should drink from it.
...
And he sends it as a gift to members of his household; so that his wife will be blessed.
...
They said to him, “Where is your wife Sarah?” And he replied, “There, in the tent.”
ויאמרו אליו AND THEY SAID UNTO HIM — The letters 'א' י' ו of the word אליו have dots over them (thus distinguishing these letters which form the word meaning “where is he”?). R. Simeon the son of Eleazar said: wherever you find in a particular word or phrase that the letters in ordinary writing are more numerous than those dotted, you should give a special interpretation to those in ordinary writing. Here the dotted letters are more than those in ordinary writing and you, therefore, give an explanation of the dotted letters — that of Sarah also, they asked, איו “where is he (Abraham)”? So we may learn that in his inn a man should enquire of the man (the host) as to his wife’s welfare and of the woman (the hostess) about her husband’s. In Treatise Bava Metzia (87a) it is stated: The ministering angels knew, indeed, where our mother Sarah was but they asked this question in order to call attention to her modesty (retiring disposition) and so to endear her all the more to her husband.) R. José the son of Haninah stated that they enquired where she was in order to send her the wine-cup of blessing (the glass of wine held by him who recites the Grace after meals)
For just as it behoves a man to partake of the cup of blessing (after a meal), that he merit the blessing from on high, so the angels also ate from what Abraham prepared for them that they might be privileged to feast on that which proceeds from the side of Abraham, for it is from that side that sustenance issues for all the celestial angels.
Just as she is prohibited to mix for him, so, too, he is prohibited from mixing for her. Not only that, but even to send her a cup of wine. It doesn't matter whether it is the cup of blessing or another cup, if it is designated for her. However, if they are drinking out of that cup, and she drinks after him, we need not be concerned.
Efrayim Miksha’a, disciple of Rabbi Meir, says in the name of Rabbi Meir: Abraham, our forefather, would eat non-sacred food only when he was in a state of ritual purity, i.e., he treated his food as though it were consecrated to God. And Sarah, our foremother, menstruated that day, which rendered the baked goods ritually impure, preventing Abraham from handling them. Therefore, they could not serve bread to their guests.
One who sends the cup of benediction to a woman without the knowledge of her husband forfeits his life because his mind prevailed over him. Rabbi [Judah the Prince] said: Because the evil inclination has prevailed over him. Similarly the members of a company who send the cup of benediction to a woman without the knowledge of her husband forfeit their lives because their minds prevailed over them. Rabbi [Judah the Prince] said: Because the evil inclination has prevailed over them.
After the consummation of her marriage on the first day, a bride is forbidden for the whole of the succeeding seven days, and it is not permitted to take any object from her hand all the seven days. This is the view of R. Eliezer, but R. Joshua said: Not until the matter is examined—if she was niddah while still in her father’s house, she is forbidden [to her husband], but if not she is allowed to him.
R. Eliezer was asked, ‘Is it permissible to drink from the hand of the bride so long as her husband is sitting with her at the festive table?’ He replied, ‘Whoever drinks from the hand of a bride is as though he drinks from the hand of a harlot’. [His colleagues] said to him, ‘Are not all the daughters of Israel possessed of good manners?’ He answered, ‘God forbid! Anyone who is not familiar with the Torah cannot be possessed of good manners’. R. Eleazar b. Azariah made a public declaration accompanied by the sounding of three hundred shofars, ‘Whether a bride be of the daughters of a scholar or of an ‘am ha-’areẓ, he who drinks from her hand is as though he drinks from the hand of a harlot’. He further said, ‘Whoever takes a cup from the hand of a bride and drinks from it has no share in the World to Come’.