It wasnarrated from Malik bin Numair Al-Khuza'i that his father said:
"Isaw the Prophet (ﷺ) putting his right hand on his right thighduring prayer, and pointing with his finger." (RU)
English reference (RU): Vol. 1, Book 5, Hadith 911 (RU)
Arabic reference (RU): Book 5, Hadith 964 (RU)