The number 70 represents 7 multiplied by 10, numbers that in the Bible represent heavenly and earthly perfection.
(‏ عدد ٢٩ :‏ ​ ١٢ -‏ ٣٤‏ )‏ وَٱلرَّقْمُ ٧٠ هُوَ ٧ مَضْرُوبَةٌ فِي ١٠ ،‏ رَقْمَانِ يُمَثِّلَانِ فِي ٱلْكِتَابِ ٱلْمُقَدَّسِ ٱلْكَمَالَ ٱلسَّمَاوِيَّ وَٱلْأَرْضِيَّ .‏