In February 1641/2 most adult males in England and Wales (and in a few cases, women as well) took the Oath.

The Protestation itself reads:-

I,-------- do, in the presence of Almighty God, promise, vow, and protest to maintain, and defend as farr as lawfully I maye, with my Life, Power and Estate, the true Reformed Protestant religion, expressed in the Doctrine of the Church of England, against all Popery and Popish Innovations, within this Realme, contrary to the same Doctrine, and according to the duty of my Allegiance, His Majesties Royal Person, Honour and Estate, as alsoe the Power and Privileges of Parliament, the lawful Rights and Liberties of the Subjects, and any person that maketh this Protestation, in whatsoever he shall do in the lawful Pursuance of the same; and to my power, and as farr as lawfully I may, I will appose and by all good Ways and Means endeavour to bring to condign Punishment all such as shall, either by Force, Practice, Councels, Plots, Conspiracies, or otherwise, doe any Thing to the contrary of any Thing in this present Protestation contained: and further, that I shall, in all just and honourable ways, endeavour to preserve the Union and Peace betwixt the Three Kingdoms of England, Scotland and Ireland: and neither for Hope, Feare, nor other Respect, shell relinquish this Promise, Vow and Protestation.