Ibn Abbas said: Aqra' ibn Habis asked the Prophet ﷺ saying: Messenger of Allah hajj is to be performed annually or only once? He replied: Only once, and if anyone performs it more often, he performs a supererogatory act. Abu Dawud said: The narrator Abu Sinan is Abu Sinan al-Du'wail. The same has been reported by both 'Abd al-Jalil bin Humaid and Sulaiman bin Kathir from al-Zuhri. The narrator 'Uqail reported the name "Sinan".  

أَنَّ الأَقْرَعَ بْنَ حَابِسٍ سَأَلَ النَّبِيَّ ﷺ فَقَالَ يَا رَسُولَ اللَّهِ الْحَجُّ فِي كُلِّ سَنَةٍ أَوْ مَرَّةً وَاحِدَةً قَالَ بَلْ مَرَّةً وَاحِدَةً فَمَنْ زَادَ فَهُوَ تَطَوُّعٌ  

I heard the Messenger of Allah ﷺ saying to his wives during the Farewell Pilgrimage: This (is the pilgrimage for you); afterwards stick to the surface of the mats (i.e. should stay at home).  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لأَزْوَاجِهِ فِي حَجَّةِ الْوَدَاعِ هَذِهِ ثُمَّ ظُهُورُ الْحُصْرِ