question #1 Sahih al-Bukhari 4632, Book 65, Hadith 154 : What is the significance of prostration in Surat-al-Sa’d according to Islamic teachings?

That he asked Ibn `Abbas, “Is there a prostration Surat-al-Sa`d?” (38.24) Ibn `Abbas said, “Yes,” and
then recited: “We gave…So follow their guidance.” (6.85,90) Then he said, “He (David ) is one them
(i.e. those prophets).” Mujahid narrated: I asked Ibn `Abbas (regarding the above Verse). He said,
“Your Prophet (Muhammad) was one of those who were ordered to follow them.”