He released a raven, which came and went for a while, perhaps perching on the ark between flights; then Noah released a dove, which kept returning to him until it finally found a place to roost. ​ — Genesis 7: 24 – 8: 13.
याच्या आधी नोहाने बाहेरचे वातावरण सुरक्षित व राहण्याजोगे आहे किंवा नाही याचा अंदाज घ्यायचा प्रयत्न केला होता.