Are lengthy supplications and synonymous, repeated words part of the guidance of the Salaf?

Question : Honorable Shaykh! A questioner says: Some people supplicate with lengthy phrases, repeated words, and synonyms. Is this the way of the Salaf?

Answer : Praise be to Allah, Lord of the worlds, and I send prayers and peace upon our Prophet Muhammad, and upon his family and his Companions, and upon those who follow them with excellence until the Day of Judgment.
Repeating supplications is not a problem; in fact, the Sunnah has come with this. The Prophet (peace and blessings be upon him and his family) used to supplicate three times when he made du'a. And he (peace and blessings be upon him and his family) used to supplicate with detailed supplications.
Some of it may suffice for the rest, but he (peace and blessings be upon him and his family) would do it because supplication is worship, and because he would be with Allah (Mighty and Majestic), so he would like to lengthen his conversation with Him.
Have you not seen that among his supplications (peace and blessings be upon him) was: "O Allah, forgive me all my sins, the small and the large, the public and the private, the first and the last"? Saying "O Allah, forgive me all my sins" would suffice for these words, but he (peace and blessings be upon him) was more detailed in that in order to recall the sins he had committed in these forms, and in order to lengthen his conversation with his Lord (Mighty and Majestic). However, what some people do of supplicating with vague phrases that are not in the Book or the Sunnah is what may be criticized in a person. For this reason, we advise our brothers to be keen to supplicate with what came in the Book and the Sunnah, for in it is much good, and it is better than the composed supplications that the ear rejects, which may contain phrases that are not befitting Allah, nor befitting the one who supplicates.