Hasan says that the prayer of the person who does not recite the tasbihat in bowing and prostration is devoid of tranquility and is afflicted with haste.

Hasan used to say that the moderate bowing (ruku) and prostration (sajdah) is that a person says "Subhan Allah wa bihamdihi" three times each.

Hasan used to say that a complete prostration is when a person says the tasbih seven times, and a valid prostration is when he says it three times.

Hazrat Muhammad bin Ka'b says that the lowest level of prostration is that you place your forehead on the ground and say "Subhana Rabbi al-A'la" three times.

Hazrat Musayyib bin Rafi asked Ibrahim how many tasbihs are sufficient in prostration. He replied, "Three tasbihs."

Hazrat Ja'far bin Burqan narrates that I asked Hazrat Maymun about the duration of bowing (ruku) and prostration (sajdah), so he replied that it should not be less than the time it takes to recite three tasbihs. Hazrat Ja'far says that I asked Hazrat Zuhri, "If the bones settle and there is calmness and stability, are the pillars (of prayer) not fulfilled?" He replied, "Hazrat Maymun used to say that the duration of three tasbihs is necessary. And what I am telling you is equivalent to that."

Hazrat Ibn Masood says that reciting the tasbih three times in ruku and sujood is a moderate amount.

Hazrat Abu al-Duha states that Hazrat Ali used to say "Subhana Rabbi al-Azeem" three times in bowing (ruku) and "Subhana Rabbi al-A'la" three times in prostrations (sujood).

Hazrat Aisha (may Allah be pleased with her) narrates that the Messenger of Allah (peace and blessings be upon him) used to say these words in bowing and prostration: "Allah is very pure, very holy, the Lord of the angels and the Holy Spirit."

Hazrat Ibn Mas'ud narrates that the Noble Prophet (peace and blessings be upon him) said: When any of you performs ruku', he should say "Subhana Rabbiyal 'Azim" three times. And when he performs sajdah, he should say "Subhana Rabbiyal A'la" three times. When this has been done, then ruku' and sajdah have been performed in a complete manner. And this is their minimum amount.