Musa bin Uqbah (may Allah have mercy on him), narrating this same incident of Abdullah bin Jahsh (may Allah be pleased with him), said that it took place in Rajab, two months before the Battle of Badr, and that this also indicates that this incident was before the revelation of the verse concerning the division of spoils.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 17990