Library Eusebius of Caesarea Life of Constantine
Book 3, Chapter 22: How he dismissed Some, and wrote Letters to Others; also his Presents.
Full of joy therefore at this success, the emperor presented as it were pleasant fruits in the way of letters to those who had not been present at the council. He commanded also that ample gifts of money should be bestowed on all the people, both in the country and the cities, being pleased thus to honor the festive occasion of the twentieth anniversary of his reign.
English translation by Ernest Cushing Richardson, in Nicene and Post-Nicene Fathers, Series II, Vol. I (eds. Philip Schaff and Henry Wace; Buffalo: Christian Literature Publishing Co., 1890). Public domain. Digital text via New Advent Church Fathers.