the_debt_of_time

Arthur leant forward, tying Sirius and Mia's hands together with a golden cord
before asking, "Does this couple come today with the blessings of their Houses?"
Immediately Harry and Tonks stepped forward, each with a different coloured cord
in their hand.
"I... Nymphadora Lupin―" Several people in the circle had a chuckle at Tonks's
expense, much to the annoyance of Andromeda. "—blood cousin of Sirius Black and
chosen representative of our family, give my blessing for my cousin to forever bind the
House of Potter to the House of Black." She stepped forward, grinning as she tied the
black cord in her hand around Sirius's wrist and then secured it to Mia's.
Harry stepped up and spoke. "I, Harry Potter, bonded brother of Hermione Potter,
give my blessing for my sister to forever bind the House of Black to the House of Potter."
He then tied the red cord in his hand around Mia's wrist and secured the opposite end to
Sirius's, stopping only to kiss Hermione's cheek.
"Sirius and Mia, these cords are symbolic of the vows you will each take, tying you
to the same House, uniting your families as friends and allies from this moment forward,
and in the process binding together your hearts and your magic, sealing the Soul Bond that
has been prepared and provoked for many years. As your hands have been bound together,
so shall the rest of your lives be bound together. Do you each come here this day of your
own free will?" Arthur asked.
"We do," they said together.
"Do you swear upon your magic to be faithful partners throughout your lives?"
"We do."
"Do you swear upon your magic to establish between yourselves a lifelong
friendship?"
"We do."
"Do you swear upon your magic to love one another without reservation?"
"We do."
"Do you swear upon your magic to stand by one another, in sickness and health, in
plenty and in want, in times of joy and sorrow, in years of peace and in war?"
"No," Sirius blurted out. "No more sorrow. No more war."
"Hermione Potter," Arthur said with a smile. "Turn to your new Lord Husband and
make your vow."