And when he received the sefer, the Arbah Chayyot and the esrim v'arba'ah Zekenim fell down before the Seh  Lamb, Yeshayah 53:7 , each one having a nevel  harp  and golden ke'arot  bowls  full of ketoret  incense , which are the tefillos  prayers  of the kedoshim; [Tehillim 141:]