Reference for Bava Kamma 174:2
איתיביה החובל בבנו גדול יתן לו מיד בבנו קטן יעשה לו סגולה החובל בבתו קטנה פטור ולא עוד אלא אחרים שחבלו בה חייבין ליתן לאביה ה"נ בשבת:
[from the following]: ONE WHO INJURES A HEBREW SLAVE IS SIMILARLY LIABLE FOR ALL OF THEM, WITH THE EXCEPTION HOWEVER OF LOSS OF TIME IF HE IS HIS OWN SLAVE!<span class="x" onmousemove="('comment',' Why then should the payment for Loss of Time in the case of a minor girl not go to her father to whom the hire for her labour would belong? ');"><sup>2</sup></span> — Abaye replied: Rab surely agrees regarding the item of Loss of Time, as the work of her hands during the period preceding the age of womanhood<span class="x" onmousemove="('comment',' Which begins six months after puberty was reached at approximately the age of twelve; cf. Nid. 45b; 65a and Keth. 39a. ');"><sup>3</sup></span>