Rashi on Genesis 18:27/רש"י על בראשית י״ח:כ״ז

1הואלתי means I am willing to speak, just as (Exodus 2:21) “And Moses was pleased (ויואל) [to dwell with the man]”.

2ואנכי עפר ואפר I Am BUT DUST AND ASHES — I would long ago have been reduced to dust by the kings and to ashes by Nimrod had it not been that Thy mercies stood by me (Genesis Rabbah 49:11).