Reference for Bava Batra 245:8

וכי תימא בכורה מבכורתו לא גמרינן ת"ש והבכורה ליוסף

[is to consist in the receiving of a portion] twice as much as [any] one [of the others]. Furthermore it is said, Moreover I have given thee one portion above thy brethren, which I took out of the hand of the Amorite with my sword and with my bow.<span class="x" onmousemove="('comment',' Gen. XLVIII, 22. ');">¹³</span> Did he take [it] with his sword and with his bow'? Surely it has already been said, For I trust not in my bow, neither can my sword save me!<span class="x" onmousemove="('comment',' Ps. XLIV, 7. ');">¹⁴</span>

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