Keeping up the Duha prayer, which is the prayer of those who turn often to Allah

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "None is regular in the forenoon (Duha) prayer except one who constantly turns to Allah in repentance," and he said: "It is the prayer of the Awwabin (those who constantly turn back to Allah)."
This hadith is sahih (authentic) on the condition of Imam Muslim, but they did not record it with this wording.

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: I saw the Messenger of Allah (peace and blessings be upon him) during a journey praying eight voluntary rak'ahs of the forenoon (Duha). When he (peace and blessings be upon him) finished the prayer, he said: "I have offered this prayer with longing and with fear, and I asked my Lord for three things; He granted me two and withheld one from me. I asked that He not destroy my Ummah through years of famine, and Allah granted this. I asked that no outside enemy be made to overpower them, and Allah granted this too. And I asked that He not split them into factions among themselves, and Allah refused that."
The chain of this hadith is sahih (authentic), but the two Shaykhs did not record it with this wording; they only agreed upon the hadith of Sayyidah Umm Hani (may Allah be pleased with her) about the eight rak'ahs.

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) did not pass away until most of his (peace and blessings be upon him) prayers had come to be offered sitting.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it!