Sahih al-Bukhari Book 68, Hadith 52
The Prophet (ﷺ) pointed with his hand towards Yemen and said twice, "Faith is there," and then pointed
towards the East, and said, "Verily, sternness and mercilessness are the qualities of those who are busy
with their camels and pay no attention to their religion, where the two sides of the head of Satan will
appear," namely, the tribes of Rabl'a and Muqar.
The Prophet (holding out his ten fingers thrice), said, "The month is thus and thus and thus," namely thirty days. Then (holding out his ten fingers twice and then nine fingers), he said, "It may be thus and thus and thus," namely twenty nine days. He meant once thirty days and once twenty nine days.
Allah's Messenger (ﷺ) said, "I and the one who looks after an orphan will be like this in Paradise," showing his middle and index fingers and separating them.