Marriage Vows

Marriage is one of the world's oldest rituals and the wedding vows which are commonplace today have hardly changed for centuries.

Wikipedia says:
The traditional vows, taken from the Book of Common Prayer are, "To have and to hold from this day forward, for better for worse, for richer for poorer, in sickness and in health, to love and to cherish, till death us do part."

They were first published in English in the prayer book of 1549, based on earlier Latin texts (the Sarum and York Rituals of the medieval period). An older version of the final phrase is " until death us depart" where "depart" means "separate". "Until death us depart" had to be changed due to changes in the usage of "depart" in the Prayer Book of 1662. In the 1928 prayer book (not authorised) and in editions of the 1662 prayer book printed thereafter "obey" was retained (in the 1928 book an alternative version omitted this). The 1928 revised form of Matrimony was quite widely adopted, though the form of 1662 was also widely used, though less so after the introduction of the Alternative Service Book

Top thriller writer Tom Cain recently posted this on his Facebook profile:
One of the great pleasures of writing is the research: one keeps discovering fascinating little tidbits of information. For example, I've just been looking at the words of an 11th century wedding service, and the vows are virtually identical to the classic 1662 version, in the Book of Common Prayer, which are still in use today. So couples having been making the same promises, in the same words for almost 1,000 years!

So there you have it. The vows which are said in The Mill Forge as part of the modern wedding ceremony are pretty much the same vows which couples have been reciting since medieval times.