First: the hadith is weak.
Second: the Prophet’s ﷺ own practice, by itself, does not establish an obligation. If the act is devotional it points to recommendation, and if it is customary it indicates permissibility.
4 – The preacher should implore Allah to grant the Muslims victory, support, honor, empowerment, and dominance over their enemies.
5 – He should pray for the exaltation of Allah’s word, the spread of His religion, and the implementation of His Book and the Sunnah of His Prophet ﷺ.
6 – He should supplicate for the leaders of the Muslims, asking that they be granted right guidance and success, that their hearts be united and their ranks gathered upon the truth, that they be aided in supporting the religion of Allah, endowed with righteous advisers, and protected from evil counsel.
7 – He ought to favor comprehensive, all-inclusive prayers; when these supplications are drawn from the transmitted texts they are superior—especially during the hours when petitions are most readily answered, at virtuous times, and even more so in virtuous places. Such opportunities must be seized and not neglected; whoever neglects them is truly deprived. May Allah grant all of us the readiness to take advantage of them.
8 – As for hadith no. (382), it indicates the recommendation that the preacher remind the congregation during the sermon with verses from the Book of Allah. The Exalted says, “This is a blessed Book We have sent down to you, so that they may ponder its verses and that those of sound intellect may take heed” (Sad 38:29). We noted earlier that the Prophet ﷺ would recite Surah Qaf because it contains admonitions and warnings, reminders of death, of everlasting bliss, and of painful punishment. The Quran is indeed the finest teacher, reformer, and guide. Allah the Exalted says, “Surely this Quran guides to that which is most upright and gives glad tidings to the believers who do righteous deeds that they shall have a great reward, and that for those who do not believe in the Hereafter We have prepared a painful punishment” (al-Isra 17:9–10).
9 – The verses the preacher selects for the sermon should fit the subject of the sermon, serve as evidence for what he is saying, and reinforce his message, so that his sermon becomes an exposition of those verses and a clarification of their meanings. In this way he avoids scattering the listeners’ thoughts by moving between unrelated topics.