Muwatta Imam Malik Book of Hajj, Hadith 114

Yahya related to me from Malik from Hisham ibn Urwa that his father said that the Messenger of Allah ﷺ once said to Abd ar-Rahman ibn Awf, "What do you do, Abu Muhammad, when saluting the corner?" and Abd ar-Rahman said, "Sometimes I salute it, and sometimes I don't." The Messenger of Allah ﷺ said, "You are right."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّهُ قَالَ قَالَ رَسُولُ اللَّهِ ﷺ لِعَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ " كَيْفَ صَنَعْتَ يَا أَبَا مُحَمَّدٍ فِي اسْتِلاَمِ الرُّكْنِ " . فَقَالَ عَبْدُ الرَّحْمَنِ اسْتَلَمْتُ وَتَرَكْتُ . فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " أَصَبْتَ " .