وَعَنْ أُمِّ وَرَقَةَ رَضِيَ اَللَّهُ عَنْهَا, { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-أَمَرَهَا أَنْ تَؤُمَّ أَهْلَ دَارِهَا } رَوَاهُ أَبُو دَاوُدَ, وَصَحَّحَهُ اِبْنُ خُزَيْمَةَ.‏ 1‏.‏

‏1 ‏- حسن.‏ رواه أبو داود (592)‏، وابن خزيمة (1676)‏.‏

Translation
In the narration of Ahmad, Abu Dawud and an-Nasa'i from the Hadith of 'Abdullah bin Ja'far (RA) Marfu' [attributed to the Prophet(ﷺ)]

'Whoever doubts about his Salat (prayer), should make two prostrations after the Taslim (salutations).'[Ibn Khuzaimah graded it Sahib (authentic)].