27:15An-Naml

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."

I asked Mujahid regarding the prostration in Surat Sa`d. He said, "I asked Ibn `Abbas, 'What evidence makes you prostrate?' He said, "Don't you recite:--'And among his progeny, David and Solomon..(6.84). Those are they whom Allah had guided. So follow their guidance.' (6.90) So David was the one of those prophets whom Prophet (Muhammad) was ordered to follow. David prostrated, so Allah's Messenger (ﷺ) (Muhammad) performed this prostration too.'

I asked Ibn `Abbas, "Should we perform a prostration on reciting Surat-Sa`d?" He recited (the Sura) including: 'And among his progeny, David, Solomon..(up to)...so follow their guidance (6.84-91) And then he said, "Your Prophet is amongst those people who have been ordered to follow them (i.e. the preceding apostles).

The Prophet (ﷺ) prostrated in Sad and said: "Dawud did this prostration in repentance and we do it in thanksgiving."

the Messenger of Allah (ﷺ) said: “It used to be from the supplication of Dawud that he would say: ‘O Allah, indeed, I ask You for Your love and the love of those who love You, and for the action that will cause me to attain Your love, O Allah, make Your love more beloved to me than myself, my family and cold water (Allāhumma innī as’aluka ḥubbaka wa ḥubba man yuḥibbuka wal-`amalalladhī yuballighunī ḥubbak. Allāhummaj`al ḥubbaka aḥabba ilaiyya min nafsī, wa ahlī wa minal-mā’il-bārid) He said: “And when the Prophet (ﷺ) would mention Dawud, he would narrate about him, saying: “He was the best in worship out of all men.”