Sayyiduna Amr bin Hurayth (may Allah be pleased with him) narrates: At the time of the Battle of Badr I was in my mother's womb.
Al-Tabarani recorded it, and its chain is jayyid (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16124