 Quakers were exempted this oath.In 1747, with Maddox’s support, the exemption was extended to Moravians.In his speech in the House of Lords, Maddox insisted that it would be beneficial ‘if the British nation expresses itself in favour of the [United] Brethren; for whatever benefit England confers upon this ancient confessor Church must be an encouragement to all evangelical Christians throughout the world, to expect nothing but good from this country.’

On 10 March 1722/3, following his return to London from Edinburgh Maddox was conferred Deacon by Thomas Green, bishop of Norwich, and given a curacy at St Bride's Church, Fleet Street.