It is narrated from Sayyiduna Samurah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whichever woman is married off by two guardians, she belongs to the first of them (to marry her off), and whichever man sells one item to two men, it belongs to the first of them (to buy it)."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6809