Imam Ibn Uyaynah (may Allah have mercy on him), regarding this hadith of the Prophet (peace and blessings be upon him), "Whoever sells a house and does not buy a house with its price, blessing is lifted from that price," said that Sufyan used to say concerning the saying of Allah Almighty, "And He placed blessing in it and determined in it its sustenance" [Surah Fussilat: 10]: So when he goes out of blessing and does not put it into something of the same kind, no blessing is given to him in it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11177