Sayyiduna Jabir (may Allah be pleased with him) relates: Previously, we used to pray behind the Prophet (peace and blessings be upon him), and during the prayer we would look at the night and its darkness (that is, the sky).
Al-Bazzar recorded it; its chain contains Abu Bakr al-Madani, who is majhul (unknown).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2445