The French hoses were baggier than those of the English. The tailor stole the cloth off of the French hose to make English ones. This is a reference to the Weird Sisters, who cut up the truth to make it similar to the truth, yet different. Three is an important number in this play; there are the three Weird Sisters, three murderers, three traitors and three sinners as mentioned here. .
The Porter muses, "Knock, knock, knock! Who's there i'the name of Belzebub? Here's a farmer that hanged himself on the expectation of plenty. Come in time! Have napkins enow about you; here you"ll sweat for't" (I.3.3-I.3.6). Though only meant to be a joke, the Porter does make an accurate description of things to come. Lady Macbeth strips herself of her womanhood in the castle or as the Porter sees it, Hell. She is also tortured by visions; she sees the same bloody dagger that Macbeth sees as she goes to frame the guards watching over King Duncan, she sleepwalks, she is tormented by a spot on her hand reminding her of her sin, and is eventually driven to commit suicide.
The second sinner knocks on the gates of Hell, and the Porter replies, "Knock, knock! Who's there in the other devil's name? Faith, here's an equivocator that could swear in both the scales against either scale, who committed treason enough for God's sake, yet could not equivocate to heaven. O, come in equivocator" (I.3. 7-I.3.11). This sinner is admitted to hell because he was untruthful, and even his lies could not get him access to heaven. He has also committed treason supposedly in the name of God. This refers to Macbeth. He is deceitful many times to many people. Macbeth invites Banquo to his banquet as he plans to have his friend murdered before he can reach the banquet. He also lies about murdering the guards. He says he killed them in a fit of rage because they murdered King Duncan, when in fact he murdered the king himself; Macbeth committed treason.