Talmud for Rosh Hashanah 47:7
ת"ר ראינוהו ושוב לא ראינוהו אין מעידין עליו כל הכי חזו לה ואזלי
Since you disallow them [when they see] the whole, can there be any question [when they see] only half? - In fact the statement should run as follows: '[If they say they saw] half of it in water and half in the sky, half of it through the clouds and h in the sky, half of it in a mirror and half in the sky, they are not allowed to testify.' Our Rabbis taught: [If they say], We saw it [once], but did not see it again, they are not allowed to testif concerning it.
Jerusalem Talmud Rosh Hashanah
“To its North or its South?” There are Tannaim who state, “to its North” his words are accepted. There are Tannaim who state, “to its South” his words are accepted. He who said, “to its North” his words are accepted, from Ṭevet to Tamuz; he who said, “to its South” his words are accepted, from Tamuz to Ṭevet91The Babli 24a makes the changeover at the equinoxes, not the solstices. Ptolemy’s solar and lunar tables make such general statements unnecessary..
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