Narrated Mujahid:
I asked Ibn 'Abbas, "Should we perform a prostration on reciting Surat-Sad?" 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).