more: ” When R’Zeira would see Rabbinim calculating when mashiach will come he would say please don’t delay him,like a brasia: 3 things come when one is not thinking about them ,Mashiach,a metziah,and a scorpion bite”.
R’Shmuel Bar Nachmani said R’Yonaton “Tifach(inflate-afflictions) to people who calculate when mashiach will come, for they say if he doesn’t come on this and this day he will never come,rather wait for him”.