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