Upon one of his [George Whitefield's] Arrivals from England at Boston, he wrote to me that he should come soon to Philadelphia, but knew not where he could lodge when there.... My Answer was; You know my House, if you can make shift with its scanty Accommodations you will be most heartily welcome. He replied, that if I made that kind of Offer for Christ's sake, I should not miss of a Reward. And I return'd, Don't let me be mistaken; it was not for Christ's sake, but for your sake. One of our common Acquaintance jocosely remark'd, that knowing it to be the Custom of the Saints, when they receiv'd any favor, to shift the Burden of the Obligation from off their own Shoulders, and place it in Heaven, I had contriv'd to fix it on Earth.

Part III, p. 89 - The Autobiography (1817)