Talmud zu Ijow 37:21

He who sees the sun at its turning point¹³⁶According to the Babli (59b), this is the moment when the sun would stand at the point where it was created if the Julianic calendar could be extrapolated backwards. It is not permissible to read the Yerushalmi by the interpretations of the Babli. Usually, a “turning point” of the sun is either a solstice or an equinox; it also could just mean “the sun turning”. The latter meaning is implied by the Tosephta (6:6): “He who sees sun, moon, fixed stars, planets, says: Praise to the Maker of Creation. Rebbi Yehudah says, he who recites a benediction over the sun is on the way of heretics. Similarly, Rebbi Yehudah used to say, he who sees the ocean frequently has to recite a benediction if it has changed.” Here it is clear that the entire statement refers to weather-related phenomena; the following statement of R. Ḥuna therefore should not be taken to refer to the clear sky only (as it is taken in the Babli) but for all celestial phenomena when they are observed in an unpolluted sky. The coastline of the ocean may have changed during a storm; after the clearing of the sky R. Jehudah requires a new benediction., the moon at its turning point, and the sky in its purity, says: Praise to the Maker of Creation. Rebbi Ḥuna says, that means in the rainy season and only after three days. That is what is written (Job 37:21): “Now they do not see light, etc.¹³⁷The end of the verse: “He is lucent in the skies, a wind passed by and purified them,” shows that the sky is really radiant only if the sun comes out after a long rain.
A parallel Yerushalmi source, Midrash Wayiqra rabba 23(8) reads: “ ‘Now they do not see light,’ we have formulated: He who sees the sun at its turning point, the moon in its spherical shape, the stars in their paths, the planets in their order, says: Praise to the Maker of Creation. Rebbi Ḥuna says, that means in the rainy season and only after three days.” Rabbenu Ḥananel, in his commentary to the Babli, takes sun, moon, stars, and planets all together and requires a benediction if any of them has not been seen for a prolonged time.”