Rujukan Talmud untuk Yesaya 45:18: Chagigah, Jerusalem Talmud Gittin & Megillah

was not the world created only being fruitful and multiplying? As it is said, (Isaiah 45:18) "He created it not for nothingness; he formed it to be inhabited." Rather, as a rectification of the world, they force his master and make him a free man, and he writes for him a bill on half his worth. The house of Hillel retracted, to teach according to the words of the house of Shammai.

MISHNAH: A person who is half slave and half free works for his master one day and for himself one day, the words of the House of Hillel. The House of Shammai say, you provided for his master but you did not provide for him. He can marry neither a slave woman¹³¹The free part in him is forbidden any sexual relation with a slave. nor a free woman¹³²The free woman is forbidden any sexual relation with the slave part in him.: shall he be alone? But the world was created only for procreation and increase, as it is said¹³³Is. 45:18.: “He did not create it to be empty, He formed it to be settled.” For the public good one forces his master to manumit him and he writes a bond for half his value¹³⁴This entered Roman law by a decree of Justinian, c. 1. C. 7,7. Most earlier jurists rejected the idea of partial manumission; cf. R. Taubenschlag (Note 104), p. 75.. The House of Hillel changed and instructed following the House of Shammai.

From this we may conclude that that selling one Sefer Torah to buy another is permitted? Perhaps study comes under a different rule, since study leads on to practice. Marrying also [is permitted because it says], “He created it not as waste, he formed it to be inhabited” (Isaiah 45:18) but to selling a Sefer Torah to buy another is not permitted.