It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: If a man gives a woman even two handfuls of flour as a dowry, she becomes lawful for him.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14824
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف صالح بن مسلم بن رومان