Here is Daniel buying the ranch from the Sunday family. The whole conversation basically involves Eli calling Daniel out on his search for oil and turning it into a bidding war. Eli demands $10 000 "for the church" and Daniel gives him another stare down, he knows something is up. Daniel then makes it clear that he will buy the property for $5 000, and he offers the church a $5 000 "bonus"* down the line. When they go to shake hands Daniel, Eli, and HW shake in the traditional method when you are saying grace before a meal. Daniel breaks from his grasp in a resentful manner and makes his leave. This is because Daniel is onto Eli, he knows he's a schemer, just like Paul, and he makes his money through the church. This is expanded on much later in the movie but Daniel's sense that Eli is a phony is apparent the entire movie and further proof exemplifies that.
*Daniel describes the majority of the money he gives to people as "bonuses". It's a fine example at his mastery of wordplay as the word bonus always comes off as "something extra" even though the bonus is probably the only money Daniel gives you.
