Musnad Ahmad Hadith 12917

It is narrated from Anas (may Allah be pleased with him) that there was a man who was very old and weak; he could not come repeatedly to pray with the Prophet (peace be upon him). He submitted to the Prophet (peace be upon him) that he did not have the strength to come again and again to pray with him, and requested that if the Prophet (peace be upon him) would come to his house one day and pray at a certain place, then he would perform his prayers there. Accordingly, he once arranged an invitation and called the Prophet (peace be upon him), and sprinkled water on a corner of a mat. The Prophet (peace be upon him) prayed two rak‘ahs there. Upon hearing this, a man from the family of Jarud asked Anas (may Allah be pleased with him) whether the Prophet (peace be upon him) used to pray the Duha prayer. He replied that he had only seen the Prophet (peace be upon him) perform that prayer on that day.