What are the connotations of "La'anos bo Sarah"?
Rashi: It means to testify something that is not correct, that completely removes the witnesses from the testimony 1 - because other witnesses testify that the witnesses were with them in another location and cannot possibly have seen what they claim to have seen. 2
Yerushalmi Makos, 1:7: It refers to a second pair of witnesses, who testify that they were with them in another location. 3
What are the implications of the word "La'anos bo Sarah"?
Makos, 5a and Yerushalmi Makos, 1:7: It implies that the second pair of witnesses are not coming to contradict the testimony of the first pair, but on the witnesses themselves. 1
Refer to 19:16:1:2 and to 19:18:2.1:2 and see Torah Temimah, note 54,