It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) performed eight bowings (ruku) and four prostrations (sujood) in the prayer he led during the solar eclipse.
Hadith Referenceمسند احمد / ومن مسند بني هاشم / 1975
Hadith Gradingحکم دارالسلام:إسناده ضعيف، حبيب بن أبى ثابت مدلس، وقد عنعنه والمتن شاذ، والمحفوظ: أربع ركعات وأربع سجدات.