It is narrated from Sayyiduna Zayd bin Thabit (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The umra belongs to the heir" (or he said: "Its path is the path of inheritance").
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 4935