Reference for Bava Kamma 110:13

שן דכתיב (שמות כב, ד) ובער בשדה אחר עד דעביד כעין ובער

[that is to say] only where he acted [wrongly] as by actually sending it forth.<span class="x" onmousemove="('comment',' But not where any precaution has been taken. ');">²⁰</span> It was [further] taught:<span class="x" onmousemove="('comment',' Cf. supra 2b. ');">²²</span>

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