BT Meil 20b(21) :פרח ליביה כי ציפרא‏ : his heart will palpitate like (the fluttering of ) a bird
See the entire entry for leḇ, lebbāˀ n.m. heart; mind

BT Meil 20b(21) :דמסו̇ב̇ר ואכל ציפרא פרח ליביה כי ציפרא‏ : the heart of one who lets blood and eats (the meat of ) a bird will palpitate like (the fluttering of ) a bird
See the entire entry for swbr#2 vb. to let blood