Hadith 1711 - The Book on Jihad - Jami` At-Tirmidhi - جامع الترمذي - Collection of Actions, Sayings and Teachings of Prophet Muhammad (صلى الله عليه و سلم) - Kutub as-Sittah

Jami` At-Tirmidhi - جامع الترمذي

23. The Book on Jihad - كتاب الجهاد عن رسول الله صلى الله عليه وسلم

31) Chapter: What Has Been Related About the (Age) Of Adulthood For A Man And When He Is To Recieve A Salary

Another chain with similar, but he (Nafi') said:

"Umar [bin 'Abdul-'Aziz] said: 'This is the limit that distinguished between children and soldiers.'" And he did not mention him writing about the salary

[Abu 'Eisa said:] The Hadith of Ishaq bin Yusuf is a Hasan Sahih Gharib Hadith as narration of Sufyan Ath-Thawri

Reference: 1711
English reference: Vol. 3, Book 21, Hadith 1711
In-book reference: Book 23, Hadith 42
Grade: Sahih (Darussalam)
Read this hadith from Darussalam Collection

31) باب مَا جَاءَ فِي حَدِّ بُلُوغِ الرَّجُلِ وَمَتَى يُفْرَضُ لَهُ‏)‏

حَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ عُبَيْدِ اللَّهِ، نَحْوَهُ بِمَعْنَاهُ إِلاَّ أَنَّهُ قَالَ قَالَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ هَذَا حَدُّ مَا بَيْنَ الذُّرِّيَّةِ وَالْمُقَاتِلَةِ ‏.‏ وَلَمْ يَذْكُرْ أَنَّهُ كَتَبَ أَنْ يُفْرَضَ ‏.‏ قَالَ أَبُو عِيسَى حَدِيثُ إِسْحَاقَ بْنِ يُوسُفَ حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ مِنْ حَدِيثِ سُفْيَانَ الثَّوْرِيِّ ‏.‏