How did the phrase "In God We Trust" get on our coins? It was on this day, March 3, 1865, that Congress approved inscribing the motto on all our national coins. Abraham Lincoln signed the bill into law. Less that two months later Lincoln was assassinated. At a memorial address for Lincoln, Speaker of the House Schuyler Colfax noted: "Nor should I forget to mention here that the last act of Congress ever signed by [President Lincoln] was one requiring that the motto, in which he sincerely believed, 'In God We Trust,' should hereafter be inscribed upon all our national coins."