What is the explanation of the following phrases from the book "Multaqa al-Abhur" for Hanafis: 1. "A free woman said to her husband's master, 'Emancipate him on my behalf for a thousand,' and he did so. The marriage becomes invalid, she is liable for the thousand, and the wala' (right of inheritance/patronage) belongs to her. It is valid on account of her expiation if she intended it, but if she did not say 'for a thousand,' it is not invalidated and the wala' belongs to him."? 2. "And one person can undertake both sides of the marriage contract, such that he is a guardian for both parties, or an agent for both, or a guardian and a principal, or a guardian and an agent, or an agent and a principal."?

The first phrase means that if a free woman emancipates a slave she is married to, or marries a slave then purchases and emancipates him, the marriage becomes invalid, and the right of wala' (patronage) belongs to her, because it is impermissible for a slave to be married to his mistress.

As for the second phrase, it refers to the permissibility of one person acting on behalf of both parties in a marriage contract in five scenarios: (1) being the guardian for both spouses (e.g., a father for a young husband and an uncle for the wife), (2) being an agent for both of them, (3) being the guardian for one and the principal for the other (e.g., a paternal cousin marrying his paternal cousin), (4) being the guardian for one and an agent for the other, or (5) being an agent for the wife and the principal on his own behalf.