Reference for Zevachim 62:11

השתא ומה לאכול ולאכול דבר שאין דרכו לאכול לא מצטרף לאכול ולהקטיר מיבעי

you can infer this from the first clause: [IF HE INTENDS TO EAT] HALF AS MUlch AS AN Olive WITHOUT, HALF AS MUCH AS AN OLIVE ON THE MORROW, [HIS INTENTIONS] COMBINE. If [he informs us about intending] to eat and to burn,<span class="x" onmousemove="('comment',' That they do not combine. I.e., if the law is taught for its own sake, and not for the sake of a deduction.');">¹⁰</span>

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