assalaamu alaykum wa rahmatullaahi wa barakaatuh.Please provide me with the hadith sources and arabic (with vowels) for the dua "O Allaah, send one of your dogs against him". Shukran

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad, sallallaahu 'alayhi wa sallam, is His slave and Messenger.

This Hadith was reported in a story that was mentioned in several Hadith sources, for example al-Hakim narrated in al-Mustadrak - and he graded it as Sahih (authentic) and al-Dhahabi agreed with him, on the authority of Abu Noufal bin Abi Aqrab, may Alllaah have mercy upon him, on the authority of his father, who said: Lahab Ibn Abu Lahab used to insult the Prophet, sallallaahu ‘alayhi wa slam, then the Prophet, sallallaahu ‘alayhi wa sallm, said: “O Allah, let one of your dogs overcome him”, (اللَّهُمَّ سَلِّطْ عَلَيْهِ كَلْبَكَ); so he [Lahab Ibn Abu Lahab] went out in a caravan to the Levant, and he stayed at a place and said: “I fear the supplication of Muhammad ”. They told him not to fear, and they put their belongings around him and guarded him, then a lion came and snatched him and took him away.”

It was also narrated by Abu Na’eem in Dala'il an-Nubuwwa, may Allaah have mercy upon him, with its chain of narration - in a long story - and in which the Messenger of Allah said: “O Allah, send one of your dogs against him.” (اللَّهُمَّ ابْعَثْ عَلَيْهِ كَلْبًا مِنْ كِلَابِكَ).
Allah knows best.