The Me’or Einayim was the sandik at the bris of his grandson, Rav Aharon of Chernobyl zy’a. He gave the baby a blessing that ‘he should see the coming of Moshiach.’
When Rav Aharon was in his 80s, he began to look young again. He even grew new teeth. He sent a minyan to the gravesite of the Me’or Einayim and told them to say on his behalf, ‘Grandfather, you blessed me to live to see Moshiach. Chazal say (Bava Basra 49B) that if someone says ‘I can’t keep this type of decree of the Chochomim, we listen to him.’ I am mevater on the bracha.’