Musannaf Ibn Abi Shaybah

Hazrat Ata bin Saib narrates that once I entered the mosque and saw two elderly men sitting there, one of whom was teaching the Holy Qur'an to the other. I also sat down with them. One of them was Hazrat Qais bin Sakan Asadi, and the other man was reciting Surah Maryam to him. When they reached the verse of prostration, Qais bin Sakan said, "Leave it; we dislike that the people of the mosque see us." So he left it and recited the next part. Then Hazrat Qais said, "By God! It was Satan who incited us to leave this verse." Recite it. So he recited it and performed the prostration after reciting.

Hazrat Sha'bi says that the predecessors disliked passing by a verse of prostration without performing the prostration.

Hasan, regarding the person who recites a verse of prostration during prayer, says that it is not appropriate for him to pass by leaving it.

Ibrahim says that it is not permissible to pass by a verse of prostration without acting upon it. However, if one wishes, he may recite it and perform prostration, and if he wishes, he may bow (perform ruku‘) instead.