Reference for Bava Batra 251:2

אמר רב הונא אמר רב אסי בכור שמיחה מיחה

R. Huna said in the name of R. Assi: [If] the firstborn son had protested [against the proposed improvements in the bequeathed estate]<span class="x" onmousemove="('comment',' Demanding the distribution of the property prior to the introduction of the improvements; and the other heirs effected them against his wish. ');">³</span> his protest is valid.<span class="x" onmousemove="('comment',' Lit., 'he protested'. He is entitled to a double portion even in the appreciation that was produced by their efforts. ');">⁴</span>

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