Reference for Chullin 70:7

ואי אמרת

Surely we have learnt: If [an 'am ha-arez] said: 'I have set aside in this [barrel of terumah w<span class="x" onmousemove="('comment',' This being a frequent and common source of uncleanness, greater precaution is therefore necessary with regard to consecrated things, so that clothes which are deemed clean for terumah may yet be deemed unclean for consecrated purposes.');">¹</span>

Jastrow