שְׁנַּיִם שֶׁהֵעִידוּ וְאָמְרוּ בְּמִזְרַח הַבִּירָה הָרַג זֶה אֶת הַנֶּפֶשׁ בְּשָׁעָה פְּלוֹנִית וּבָאוּ שְׁנַיִם וְאָמְרוּ לָהֶן בְּמַעֲרַב הַבִּירָה הַזֹּאת הֱיִיתֶם עִמָּנוּ בָּעֵת הַזֹּאת. אִם יָכוֹל הָעוֹמֵד בְּמַעֲרָב לִרְאוֹת מַה שֶּׁבַּמִּזְרָח אֵינָן זוֹמְמִין. וְאִם אֵינוֹ יָכוֹל לִרְאוֹת הֲרֵי אֵלּוּ זוֹמְמִין וְאֵין אוֹמְרִין שֶׁמָּא מְאוֹר עֵינֵיהֶם שֶׁל רִאשׁוֹנִים רַב וְרוֹאִין מֵרָחוֹק יֶתֶר מִכָּל אָדָם. וְכֵן אִם הֵעִידוּ שְׁנַיִם וְאָמְרוּ בַּבֹּקֶר הָרַג זֶה אֶת הַנֶּפֶשׁ בִּירוּשָׁלַיִם וּבָאוּ שְׁנַיִם וְאָמְרוּ לָהֶן בְּיוֹם זֶה בָּעֶרֶב הֱיִיתֶם עִמָּנוּ בְּלוּד. אִם יָכוֹל אָדָם לְהַלֵּךְ אֲפִלּוּ עַל הַסּוּס מִירוּשָׁלַיִם לְלוּד מִבֹּקֶר עַד עֶרֶב אֵינָן זוֹמְמִין וְאִם לָאו הֲרֵי אֵלּוּ זוֹמְמִין וְאֵין אוֹמְרִין שֶׁמָּא כַּר קַל בְּיוֹתֵר נִזְדַּמֵּן לָהֶן וְקִפְּלוּ אֶת הַדֶּרֶךְ אֶלָּא בְּדָבָר הַמָּצוּי הַיָּדוּעַ לַכּל מְשַׁעֲרִין לְעוֹלָם וּמְזִימִין אוֹתָן:
The following rules apply when two witnesses testify, saying: "So-and-so murdered a person in the eastern portion of the hall at this-and-this time," two other witnesses came and said: "You were together with us in the western portion of the hall at that time." If a person standing in the western portion could see what transpires in the eastern portion, they are not disqualified through hazamah. If, however, it is impossible to see what transpires, they are disqualified through hazamah. We do not say perhaps the eyesight of the first pair is very powerful and they can see things which transpire at a greater distance than all other men. Similar principles apply if two people testified saying: "In the morning, so-and-so committed murder in Jerusalem," and two others come and tell them: "On that day, in the evening, you were together with us in Lod." If it is possible for a person to travel, even on horseback, from Jerusalem to Lod from the morning to the evening, they are not disqualified through hazamah. If not, they are disqualified through hazamah. We do not say perhaps they found a speedy camel and were able to travel the route faster than usual. Instead, we always calculate the matter using according to the known standards and disqualify them through hazamah.
