Secrets of Enoch (2 Enoch, Slavonic Enoch) 21:1
They leave not nor depart day or night standing before the face of the Lord, working His will, cherubim and seraphim, standing round His throne. And the six-winged creatures overshadow all His throne, singing with a soft voice before the face of the Lord: ‘Holy, Holy, Holy: Lord God of Sabaoth heaven and earth are full of Thy glory!’
Background and history of Secrets of Enoch (2 Enoch, Slavonic Enoch), and issues with this book.
W. R. Morfill’s translation from the Slavonic, edited with introduction, notes, and indices by R. H. Charles, The Book of the Secrets of Enoch (Oxford: Clarendon Press, 1896). Public domain in the United States. Morfill died in 1909 and Charles died in 1931, so the book is in the public domain in the United Kingdom. The verses are transcribed from the Internet Archive scan bookofsecretsofe00morf. Charles’s footnotes, exegetical notes, and bracketed section headings are left out. Charles prints the longer A text and gives B and Sokolov’s manuscript in his notes. Square brackets inside verses are his.