Who said "Stand firm and hold to the teachings we passed on to you."?

This quote is attributed to Saint Paul.

Stand firm and hold to the teachings we passed on to you. - Saint Paul

"Stand firm and hold to the teachings we passed on to you."

Saint Paul Perseverance

Apostle, Missionary Roman-Jewish 5–67

"I have fought the good fight, I have finished the race, I have kept the faith."

"Love never fails."

"For to me, to live is Christ and to die is gain."

"I can do all things through Christ who strengthens me."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."