The Prophet ﷺ said, "Allah has made an opening in the wall of the Gog and Magog (people) like this, and he made with his hand (with the help of his fingers).  

عَنِ النَّبِيِّ ﷺ قَالَ فَتَحَ اللَّهُ مِنْ رَدْمِ يَأْجُوجَ وَمَأْجُوجَ مِثْلَ هَذَا وَعَقَدَ بِيَدِهِ تِسْعِينَ  

The Prophet ﷺ said, "A hole has been opened in the dam of Gog and Magog." Wuhaib (the sub-narrator) made the number 90 (with his index finger and thumb).  

عَنِ النَّبِيِّ ﷺ قَالَ يُفْتَحُ الرَّدْمُ رَدْمُ يَأْجُوجَ وَمَأْجُوجَ مِثْلَ هَذِهِ وَعَقَدَ وُهَيْبٌ تِسْعِينَ  

Today the wall (barrier) of Gog and Magog has been opened so much, and Wuhaib (in order to explain it) made the figure of ninety with the help of his hand.  

عَنِ النَّبِيِّ ﷺ قَالَ فُتِحَ الْيَوْمَ مِنْ رَدْمِ يَأْجُوجَ وَمَأْجُوجَ مِثْلُ هَذِهِ وَعَقَدَ وُهَيْبٌ بِيَدِهِ تِسْعِينَ  

Today the wall (barrier) of Gog and Magog has been opened so much, and Wuhaib (in order to explain it) made the figure of ninety with the help of his hand. (Using translation from Muslim 2881)  

عَنِ النَّبِيِّ ﷺ قَالَ فُتِحَ الْيَوْمَ مِنْ رَدْمِ يَأْجُوجَ وَمَأْجُوجَ مِثْلُ هَذَا وَعَقَدَ وُهَيْبٌ تِسْعِينَ  

[Machine] The Messenger of Allah ﷺ said: "A hole has been opened in the barrier of Ya'juj and Ma'juj like this (he made a small circle with his fingers), and it was made tight (closed) for a length of ninety."  

قَالَ رَسُولُ اللهِ ﷺ فُتِحَ مِنْ رَدْمِ يَأْجُوجَ وَمَأْجُوجَ مِثْلُ هَذَا وَحَلَّقَ تِسْعِينَ وَضَمَّهَا