Also try breaking up verses into smaller bits if it’s longer, for example, if you take Rev. 4:8, you could memorize “And the four living creatures each of them with six wings”, then “are full of eyes around and within, and day and night they never cease to say”, and finally, “Holy, holy, holy is the Lord God Almighty, who was and who is and who is to come.” You can change how big or little the chunks are, but essentially you memorize the verse in pieces, then merge them together.