The reason the Prophet did not return to the statement of Dhu al-Yadayn

Question:
Why did he (peace and blessings be upon him) not return to the statement of Dhu al-Yadayn?

Answer:
Because when he (peace and blessings be upon him) forgot and said the closing salam while the prayer was incomplete, and then stood up after the salam and sat in a place he had moved to, Dhu al-Yadayn came to him and said, “Did you shorten the prayer, O Messenger of Allah?” He said, “No.” He said, “Did you shorten it or forget?” He said, “It was not shortened and I did not forget.” Then he (peace and blessings be upon him) asked his companions and said, “Is Dhu al-Yadayn truthful?” They said, “Yes, O Messenger of Allah.” So he stood up and completed what was missing from his prayer and prostrated for forgetfulness.