Wa alaykum salam wa rahmatuLlahi wa barakatuHu,
In ‘Umdat al-Mufti wa al-Mustafti 1/168, there is a discussion on litanies (i.e. awrad/ahzab). The author discusses this from the perspective of what is best and preferable for one to observe: the prayers after maghrib that are established in the Sunnah or the litany?
The author related that these litanies are not found in the first generations; but the pious saints and scholars of the ummah found them to be beneficial. For this reason, doing what is established in the Sunnah first would be best.
In many of these hizbs, the invocations related are sourced to the Qur’an and the Sunnah. Much of what they contain may be found traced back to either of these sources. The litanies of the masha’yikh are beautiful and full of nur, they have been used, prescribed, and accepted by many of Islam’s greatest scholars. That which comes in the Qur’an and Sunnah is always the best in every way.
And Allah knows best.
Answered by Shaykh Yaqub Abdurrahman