What's the source of "I can only give what I have"?

Right now, I'm reading *When Heaven Invades Earth* by Bill Johnson. I just came across this sentence: "If I am filled with anxiety in any given situation, it becomes hard for me to release peace--because *I can only give what I have.*" (Emphasis mine.) The phrase by itself is a good and noteworthy one, but the reason I'm posting this question is that I've heard this phrase used before, spoken by Mike Cavanaugh. Both Bill Johnson and Mike Cavanaugh have done many great things by following the Lord, both are senior pastors, and both have used this phrase. This suggests to me that there's an earlier source that both have read and drawn from. Hence, I ask: does this earlier source exist, and if so, what is it? --- I kept reading and I came across "As glorious as the gift of tongues is, it is an entrance point to a lifestyle of power.", which is another thing Mike Cavanaugh said. The answer to this question may very well be a negative in that Mike may have drawn from this book, not an earlier source. If this is the case, an answer should show this.