Who said "A promise made is a debt unpaid."?

This quote is attributed to Horace.

A promise made is a debt unpaid. - Horace

"A promise made is a debt unpaid."

Horace

Poet Ancient Rome 65–8

"Carpe diem, quam minimum credula postero."

"Seize the day, put no trust in the morrow."

"I have often regretted my speech, never my silence."

"Life gives nothing to mortals without hard work."