A similar hadith is also narrated from Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) from the Prophet (peace and blessings be upon him).
Imam al-Tabarani (may Allah have mercy on him) said: Ma'mar added this in his narration: "One sa' between every two poor people."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16298