EchRB[1]50(5) :תרין בבטנה‏ : two (fetuses) in her womb
See the entire entry for bṭen, bi/aṭnā n.m. womb; conception

EchRB[1]50(5)var. :מרב{י}<ו>עיתא דתרויהון‏ : the place where the two of them were lying down
See the entire entry for marbōˁī, marbōˁīṯā n.f. place for lying down