Reference for Bava Batra 310:12
אמר אמימר ומתנתו מתנה א"ל רב אשי לאמימר השתא ומה זביני דמקבל זוזי אמרת דלא דלמא מוזיל ומזבין כל שכן מתנה דלא מטי ליה ולא מידי א"ל
to [the case of] movables<span class="x" onmousemove="('comment',' Only when the evidence is given in connection with a dispute concerning movable objects is his evidence valid. ');"><sup>48</sup></span> but not to [that of] real estate. Said R. Ashi to Mar Zutra: Why only movables? [Is it] because his sale [of these] is a [legal] sale?<span class="x" onmousemove="('comment',' The Mishnah which regards his sale as invalid speaks of real estate and not of movables. ');"><sup>49</sup></span> If so,<span class="x" onmousemove="('comment',' Lit., 'but from now'. ');"><sup>50</sup></span> [would] the evidence of little children,<span class="x" onmousemove="('comment',' Of the ages of six or seven. ');"><sup>51</sup></span> of whom<span class="x" onmousemove="('comment',' Lit., 'that'. ');"><sup>52</sup></span> we learnt [that] their purchase [is a valid] purchase and their sale [is a legal] sale in [the case of] movables,<span class="x" onmousemove="('comment',' Keth. 70a, Git. 59a, 65a. ');"><sup>53</sup></span> also [be regarded as legal] evidence?<span class="x" onmousemove="('comment',' Surely a child can hardly be relied upon as a witness! ');"><sup>54</sup></span> — He replied to him: There<span class="x" onmousemove="('comment',' In the case of the evidence of witnesses. ');"><sup>55</sup></span> it is required [that] both the men shall stand<span class="x" onmousemove="('comment',' Deut., XIX, 17, referring to witnesses. (Cf. Shebu. 30a). ');"><sup>56</sup></span> which is not [the case].<span class="x" onmousemove="('comment',' Where children of six or seven give evidence. ');"><sup>57</sup></span> Amemar said: His<span class="x" onmousemove="('comment',' That of a boy who is thirteen years and one day old, who is unable to carry on transactions and whose sale of real estate is invalid. ');"><sup>58</sup></span> gift [is a valid] gift. Said R. Ashi to Amemar: [How] now! If in the case of a sale, where he receives money, it has been said that it is not [valid] because it is possible [that] he might sell too cheaply, how much more so [in the case of] a gift where he receives nothing! He replied to him: