Some examples have no direct object to promote.
طَبَعَ اللَّهُ عَلَى قُلُوبِهِمْ → طُبِعَ عَلَى قُلُوبِهِمْ
غَضِبَ زَيْدٌ عَلَيْهِمْ → غُضِبَ عَلَيْهِمْ
Here the prepositional phrase is treated together as نائب الفاعل, and the passive verb remains singular. Do not invent a direct object where the sentence uses a preposition.
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Some examples have no direct object to promote.
طَبَعَ اللَّهُ عَلَى قُلُوبِهِمْ → طُبِعَ عَلَى قُلُوبِهِمْ
غَضِبَ زَيْدٌ عَلَيْهِمْ → غُضِبَ عَلَيْهِمْ
Here the prepositional phrase is treated together as نائب الفاعل, and the passive verb remains singular. Do not invent a direct object where the sentence uses a preposition.