Majma al-Zawaid 2769 — Prostration

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: When one of you prostrates, he should not prostrate lying flat, nor sitting on his hip (tawarruk), for when he performs the prostration well, every limb of his prostrates (or: every limb of his takes part in that prostration).
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir; its narrators are the narrators of the Sahih.