It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "There is no right of pre-emption for an absent person, nor for a minor, nor for a partner against a partner when he has preceded him in purchasing."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشفعة / 11587