I just bought an antique kiddush cup in Yerushalayim with names of the angels written all throughout the inside on the whole length of the kiddush cup (in several columns around the cup). The store ...
I have found in certain kabbalistic documents that contain names of angels there is an instruction not to say the names of those angels aloud - example with names in parenthesis. I realize we are not ...
I've heard you shouldn't say the names of angels, except for the four that surround us at night. What's the source and reason for this? Is it halacha or kaballah?