The Prophet (ﷺ) recited the supplication for a month (in prayer) and then gave it up.
Sunan Abi Dawud Book 8, Hadith 30
← Previous Hadith Anas b. Malik was asked whether the Messenger of Allah (ﷺ) had recited supplication in the dawn prayer. He replied: Yes. He was again asked whether before bowing or after bowing. He said after bowing.

This version of Musaddad adds the words: "For a short period."

Sunan Abi Dawud Book 8, Hadith 29 Next Hadith → Muhammad ibn Sirin said: Someone who prayed the morning prayer along with the Prophet (ﷺ) narrated to me: When he raised his head after the second rak'ah, he remained standing for a short while.

Sunan Abi Dawud Book 8, Hadith 31