Ibn 'Alqamah appointed his father to collect the Zakah of his people - and he quoted the same Hadith.
Sunan an-Nasa'i Book 23, Hadith 29
← Previous Hadith "Ibn 'Alqamah appointed my father to be in charge of his people, and he commanded him to collect their Sadaqah. My father sent me to a group of them to bring their Sadaqah to him. I set out and came to an old man who was called Sa'r. I said: My father has sent me to collect the Sadaqah of your sheep. 'He said: O son of my brother, how will you decode what you want to take?' I said" 'We choose, and we even measure the sheep's udders.' He said: O son of my brother, I tell you that I was in one of these mountain passes at the time of the Messenger of Allah with some sheep of mine. Two men came on a camel and said: We are the messengers of the Messengers of Allah, we come to take the Sadaqah of your sheep. I said: What do I have to give? They said: A sheep. So I went to a sheep that I knew was filled with milk and was fat, and brought it out to them. He said: This is a Shafi - a sheep that has a child or is pregnant - and the Messenger of Allah forbade us to take a Shafi'. So I went to a Mu'tat she-goat - a Mutat is one that has not given birth before, but has reached the age where it could produce young- and brought it out to them. They said: We will take it. So I lifted it up to them, and they took it with them on their camel and left."' (Daif)

Sunan an-Nasa'i Book 23, Hadith 28 Next Hadith → "Umar said: 'The Messenger of Allah enjoined Sadaqah and it was said that Ibn Jamil, Khalid bin Al-Walid and 'Abbas bin 'Abdul-Muttalib had withheld some. The Messenger of Allah said: What is the matter with Ibn Jamil? Was he not poor then Allah made him rich? As for Khalid bin Al-Walid, you are being unfair to Khalid, for he is saving his shields and weapons for the sake of Allah. As for Al-Abbas bin 'Abdul-Muttalib, the paternal uncle of the Messenger of Allah, it is and obligatory charity for him and he has to pay as much again."'

Sunan an-Nasa'i Book 23, Hadith 30