What is the ruling on saying "such and such a nawa'" in winter, and has a hadith been reported concerning that?

It is mentioned that "an-nawʾ" is derived from "nāʾa an-najm" meaning the star fell and disappeared. And the people of the pre-Islamic era (Jahiliyyah) used to attribute rain to the falling or rising star.

So, if what is meant by "an-nawʾ" is the appearance of a specific star, there is no harm in that. However, if what is meant by it is a timing and a sign for rain by the grace of Allah, then it is better to abandon that.

But if what is meant is that the rain is a result of the act of "an-nawʾ," then this is disbelief in Allah, according to the Hadith of Zayd ibn Khalid, may Allah be pleased with him: "This morning some of My slaves became believers in Me and some disbelievers. As for him who said, 'We have been given rain by the Grace and Mercy of Allah,' that is a believer in Me and a disbeliever in the stars (planets). And as for him who said, 'We have been given rain by such-and-such an-nawʾ,' that is a disbeliever in Me and a believer in the stars."