Reference for Bava Batra 217:6

אחי האב לא צריכי קרא אחי האב מכח מאן קא אתו מכח אב קאי אב קא ירתי אחי האב

[Why again not] say [thus]: 'His kinsman,<span class="x" onmousemove="('comment',' Num. XXVII, 22. ');">⁶</span> refers to the father. This teaches that a father takes precedence over the [dead man's] father's brothers. One might [assume] that he also takes precedence over brothers, it was therefore expressly stated, that is next,<span class="x" onmousemove="('comment',' Num. XXVII, 11. ');">¹⁰</span>

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