Authentic Supplication Number 165.
It is reported of `Aa’ishata that she said: A small goat was presented to the Messenger of Allah , he said: “Divide it out,” then whenever the servant would return `Aa’ishata would say: What did they say? She would say: They said: May Allah bestow blessings in you (Baraka ‘allahu feekum) then `Aa’ishata would say: And in them may Allah bestow blessings (wa feehim baraka ‘allahu), we return upon them the same as what they said, and our reward remains for us.
Al-Albani said that it was reported by Ibn As-Sunni (#273) by way of An-Nisa’ee with good ascription. Al-Albani included this hadeeth in The Authentic of Good Sayings as #185.