Zirr (may Allah have mercy on him) says that Sayyiduna Ammar (may Allah be pleased with him) recited the verse of prostration, "When the sky is split open" [Surah al-Inshiqaq: 1], on the pulpit on Friday, then he came down from the pulpit and prostrated.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5797