Sayyiduna Abdullah bin Umar and Sayyiduna Zayd bin Thabit (may Allah be pleased with them both) said that there is no harm in selling rations (rizq).
(b) Al-Sha'bi (may Allah have mercy on him) said: There is no harm in selling rations, but do not sell what you have bought before taking possession of it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10693