Reference for Bava Batra 300:4

עבדו דתנן הכותב כל נכסיו לעבדו יצא בן חורין שייר קרקע כל שהוא לא יצא בן חורין

that all one's possessions shall be given away in writing;<span class="x" onmousemove="('comment',' Otherwise, the laws stated are inapplicable. ');">⁷</span> and they are the following:<span class="x" onmousemove="('comment',' Lit., 'these'. ');">⁸</span>

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