Takbir for qunut

Al-Aswad says that when Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) finished the recitation, he would say the takbir, then recite the qunut supplication, and when he finished the qunut, he would say the takbir and bow.

Ibrahim says: When you intend to recite the qunut supplication, say the takbir for the qunut, and when you intend to bow, say the takbir again.

When Ibrahim recited the qunut, he used to say the takbir, and when he finished, he would say the takbir again.

Ibrahim says: When you finish the recitation, say the takbir, and when you finish the qunut, say the takbir again and bow.

Shu'bah says: I heard al-Hakam, Hammad and Abu Ishaq say concerning the qunut of witr: When you finish the recitation, say the takbir and then recite the qunut supplication.