Reference for Bava Batra 221:9

רב הונא בר חייא סבר למעבד עובדא כרבי זכריה בן הקצב אמר ליה רב נחמן מאי האי אמר ליה דאמר רב הונא אמר רב הלכה כר' זכריה בן הקצב אמר ליה אשלח ליה איכסיף אמר ליה השתא כי נח נפשיה דרב הונא איתריסת לקבלי

R. Huna b. Hiyya intended to decide a case in accordance with [the view of] R. Zechariah h. Hakkazzab. R. Nahman said to him: 'What is this?' He replied: '[I rely upon] that which R. Huna said in the name of Rab [that] the <i>halachah</i> is in accordance with [the view of] Zechariah h. Hakkazzab. He said to him: 'I will send to him!'<span class="x" onmousemove="('comment',' To R. Huna, to ascertain whether he really held such an opinion. ');">²²</span> He grew embarrassed.<span class="x" onmousemove="('comment',' Not being sure whether R. Huna still adhered to the same opinion. ');">²³</span> He said to him: 'Now, had R. Huna been dead, you would have continued to oppose me.'<span class="x" onmousemove="('comment',' Now, however, that R. Huna is alive, this resistance must cease. R. Nahman, apparently, suspected R. Huna b. Hiyya of quoting R. Huna without due authorisation. ');">²⁴</span>

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