Musnad Abu Ya'la al-Mawsili 165:15

Khalaf ibn Hisham narrated to us, Abu al-Ahwas narrated to us, from Abu Ishaq, from Burayd ibn Abi Maryam, from Abu al-Hawra’, who said: Al-Husayn ibn Ali (may Allah be pleased with him) said: The Messenger of Allah (may Allah bless him and grant him peace) taught me words that I say in the Qunut of the Witr: "O Allah, guide me among those whom You have guided, and pardon me among those whom You have pardoned, and take me as a charge among those whom You have taken as a charge, and bless for me what You have given, and protect me from the evil of what You have decreed. For indeed, You decree and none can decree against You, and indeed, he whom You befriend is not humiliated. Blessed are You, our Lord, and Exalted."