Musannaf Ibn Abi Shaybah 10617 — Zakat al-Fitr is paid before

It is narrated from Sa'id bin Yazid that Abu Nadrah used to sit in the mosque of the neighbourhood on the day of Fitr, and the zakah (and the like) would be brought to him. He would send a messenger to those who remained, and their zakah would also come. He would distribute it among the poor of the neighbourhood, and then he would leave the mosque.