Is the prostration of recitation obligatory, and does one who omits it sin?

The majority of scholars hold that the prostration of recitation (Sujud At-Tilawah) is a Sunnah (recommended act) for both the reciter and the listener, and not obligatory. This is based on what Al-Bukhari narrated from 'Umar, may Allah be pleased with him, that he recited Surat An-Nahl on the minbar. When he reached the prostration verse, he said: "O people, we pass by the prostration, so whoever prostrates has done well, and whoever does not prostrate, there is no sin upon him." And 'Umar, may Allah be pleased with him, did not prostrate. The Group, with the exception of Ibn Majah, narrated from Zayd ibn Thabit, who said: "I recited Surat 'An-Najm' to the Prophet, peace and blessings be upon him, and he did not prostrate in it."