Is a dua which starts with "thibbil qulbi" a saheeh one?

This is a dua for one's heart, the Prophet ﷺ used to make for his own heart the hadith collected by Imam Tirmidhi: يَا مُقَلِّبَ الْقُلُوبِ ثَبِّتْ قَلْبِي عَلَىٰ دِينِكَ "Oh Allah, You are the turn of hearts, make my heart firm upon Your religion" So it's a dua we should also make because if this is the Prophet ﷺ, our hearts are much more in need of this dua يَا مُقَلِّبَ الْقُلُوبِ ثَبِّتْ قَلْبِي عَلَىٰ دِينِكَ