PTŠab 9.b:61[2] :אלף חד למד תלתין‏ : alef is one, lamedh is thirty
See the entire entry for ˀālap̄ n.f. first letter of the alphabet

PTŠab 9.b:61[2] :
See the entire entry for lāmaḏ n.f. lamed, twelfth letter