The month (of Ramadan) is thus and thus, and thus. i.e. ten, ten and nine.

عَنِ النَّبِيِّ ﷺ قَالَ الشَّهْرُ هَكَذَا وَهَكَذَا وَهَكَذَا عَشْرًا وَعَشْرًا وَتِسْعًا