Original text: أَمَّا الْعُجْمَةُ، فَشَرْطُهَا: أَنْ تَكُونَ عَلَمًا فِي الْعُجْمَةِ، وَزَائِدَةً عَلَى ثَلَاثَةِ أَحْرُفٍ، أَوْ ثُلَاثِيًّا مُتَحَرِّكَ الْأَوْسَطِ.
Translation: Foreign proper-name status is required, together with more than three letters or a vowelled middle letter in a three-letter name.
إِبْرَاهِيم، شَتَر: the text’s diptote examples. لِجَامٌ، نُوحٌ: the text’s fully declinable examples.
Remember the source-language name, length, and middle vowel; then parse the full sentence. The next section treats the ṣīghat muntahā al-jumūʿ.