2 Corinthians 9:5
So, I thought it necessary to urge the brothers [See verse 3] to visit you ahead of time and arrange beforehand for your previously promised generous gift. Then it will be ready [when I arrive] as a generously given gift and not as something given grudgingly.
Hebrews 6:7
For God blesses land that has soaked up the rain which has fallen on it, and it produces a profitable crop for those people for whom the land was farmed.
1 Peter 3:9
Do not repay a wrong action with [another] wrong action, nor abusive [language] with [additional] abuse, but rather be a blessing [to one another]. For the purpose of your being called [by God] was so that you could receive a blessing [from Him eventually].