[Machine] The Messenger of Allah ﷺ said, "The month is like this, like this, and like this," gesturing three times with his hands, then he closed his thumb on the third time. So, if it is cloudy for you, complete thirty (days).
قَالَ رَسُولُ اللهِ ﷺ الشَّهْرُ هَكَذَا وَهَكَذَا وَهَكَذَا ثَلَاثُ مَرَّاتٍ بِيَدَيْهِ ثُمَّ قَبَضَ فِي الثَّالِثَةِ إِبْهَامَهُ فَإِنْ غُمَّ عَلَيْكُمْ فَأَتِمُّوا ثَلَاثِينَ
"The Messenger of Allah said: 'The month is like this and like this and like this." (One of the narrators) Muhammad bin 'Ubaid clapped his hands three time to demonstrate it, then he withheld his left thumb the third time. Yahya bin Saeed said to Ismail (One of the narrators): "Form his father?' He said: "No." (Using translation from Nasāʾī 2137)
قَالَ رَسُولُ اللهِ ﷺ «الشَّهْرُ هَكَذَا وَهَكَذَا وَهَكَذَا» وَصَفَّقَ مُحَمَّدُ بْنُ عُبَيْدٍ بِيَدَيْهِ يَتْبَعُهَا ثَلَاثًا ثُمَّ قَبَضَ فِي الثَّالِثَةِ الْإِبْهَامَ فِي الْيُسْرَى