question #3 Sahih al-Bukhari 1031, Book 15, Hadith 26 : How does the physical gesture of raising hands relate to the practice of Istisqa’?

The Prophet (ﷺ) never raised his hands for any invocation except for that of Istisqa’ and he used to raise
them so much that the whiteness of his armpits became visible. (Note: It may be that Anas did not see
the Prophet (ﷺ) raising his hands, but it is narrated that the Prophet (ﷺ) used to raise his hands for invocations
other than Istisqa. See Hadith No. 807 & 808 and also see Hadith No. 612, Vol. 5).