The Prophet ﷺ said: For each forgetfulness there are two prostrations after giving the salutation. No one except Amr (ibn Uthman) mentioned the words "from his father" (in the chain AbdurRahman ibn Jubayr ibn Nufayr from Thawban).

عَنِ النَّبِيِّ ﷺ قَالَ لِكُلِّ سَهْوٍ سَجْدَتَانِ بَعْدَ مَا يُسَلِّمُ لَمْ يَذْكُرْ عَنْ أَبِيهِ غَيْرُ عَمْرٍو

'The Messenger of Allah ﷺ did not prostrate that day either before the salam or after."

أَنَّهُ قَالَ لَمْ يَسْجُدْ رَسُولُ اللَّهِ ﷺ يَوْمَئِذٍ قَبْلَ السَّلاَمِ وَلاَ بَعْدَهُ

“I heard the Messenger of Allah ﷺ say: ‘For every mistake there are two prostrations, after saying the Salam.’”

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ فِي كُلِّ سَهْوٍ سَجْدَتَانِ بَعْدَ مَا يُسَلِّمُ

[AI] The Prophet Muhammad ﷺ performed the two prostrations of forgetfulness after the greeting of peace.

سَجَدَ رَسُولُ اللهِ ﷺ سَجْدَتَيِ السَّهْوِ بَعْدَ السَّلَامِ

Anas b. Malik asked me the cause of death of Yahya b. 'Abu 'Amra. I said: (He died) of plague. He said: The Messenger of Allah ﷺ said that death by plague is martyrdom for a Muslim. (Using translation from Muslim 1916a)

قَالَ رَسُولُ اللهِ ﷺ الطَّاعُونُ شَهَادَةٌ لِكُلِّ مُسْلِمٍ

Anas b. Malik asked me the cause of death of Yahya b. 'Abu 'Amra. I said: (He died) of plague. He said: The Messenger of Allah ﷺ said that death by plague is martyrdom for a Muslim. (Using translation from Muslim 1916a)

قَالَ رَسُولُ اللهِ ﷺ الطَّاعُونُ شَهَادَةٌ لِكُلِّ مُسْلِمٍ

[AI] On the authority of the Prophet ﷺ, he said, "For every mistake, two prostrations (Sajdah) should be performed after the concluding salutation (Salam)."

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ لِكُلِّ سَهْوٍ سَجْدَتَانِ بَعْدَ مَا يُسَلِّمُ

[AI] The Messenger of Allah ﷺ said, "For every unintentional mistake, there are two prostrations after the completion of the prayer."

قَالَ رَسُولُ اللهِ ﷺ «لِكُلِّ سَهْوٍ سَجْدَتَانِ بَعْدَ التَّسْلِيمِ»

"التَّسْلِيمُ بعدَ سَجْدَتَيِ السهو".