[Machine] The testimony of one witness is not valid until there are two witnesses. The Sheikh, may Allah have mercy on him, said that Imam Shafi'i brought up the topic of testimony in cases of boundaries, and we have mentioned the reports and traditions about it in the book of boundaries and the book of theft.  

لَا تَجُوزُ شَهَادَةٌ الَشَاهِدٍ عَلَى الشَّاهِدِ حَتَّى يَكُونَا اثْنَيْنِ قَالَ الشَّيْخُ رَحِمَهُ اللهُ قَدْ أَعَادَ الشَّافِعِيُّ رَحِمَهُ اللهُ هَهُنَا بَابَ الشَّهَادَةِ عَلَى الْحُدُودِ وَقَدْ ذَكَرْنَا الْأَخْبَارَ وَالْآثَارَ فِيهِ فِي كِتَابِ الْحُدُودِ وَكِتَابِ السَّرِقَةِ