Reference for Gittin 25:4

אדרבה הרי הוא מתירו בבת חורין עבדא בהפקירא ניחא ליה זילא ליה שכיחא ליה פריצה ליה:

With what case are we dealing here? Shall I say the man was in health [when he gave the instruction]? What difference does it make that the money is available, seeing that the recipient has not yet performed the act of 'pulling'?<span class="x" onmousemove="('comment',' Meshikah, v. Glos. Until this has been performed, the donor can retract, as also his heir. ');">²</span>

Jastrow