Over purim, while at my rabbi’s house – he kept talking about ‘kiflayim min haksav’ (i’m pretty sure that’s what he called it – and i don’t think it was because of the wine!)that it is a real problem in megillos and that r’ elyashiv was very machmir with this and people don’t even realize.
Can you explain this concept to me? I’m more than a bit lost!
The idea of “kiflayim min haketav” is mentioned by the Mishnah Berurah (691:17) in relation to the amount of space that has to be left blank between the sons of Haman in the Megillah.
I don’t know why you rabbi was so busy with this idea.
The actual halachic ruling is a little difficult, because the Shulchan Aruch mentions that the sons of Haman must be written as a shirah, and for writing a shirah the halachah is that one must leave the space of a parashah setumah, which is nine letters (see Beis Yosef, Yoreh De’ah 275, based on Rivash 286).