Musannaf Ibn Abi Shaybah 8025 — How many rakahs of Duha are prayed

Sa'id bin Marjanah said: I was sitting behind Sayyiduna Sa'd bin Malik (may Allah be pleased with him) while he was praying the Duha prayer. I counted, and he prayed eight rak'ahs. He sat only in the last rak'ah, in which he recited the tashahhud, then said the salam and completed the prayer.