فُلَانٌ يَشْتَرِعُ شِرْعَتَهُ

[meaning Such a one originates, or embraces, or follows, his way of religion] is similar to the phrases يَفْتَطِرُ فِطْرَتَهُ and يَمْتَلُّ مِلَّتَهُ; from شِرْعَةُ الدِّينِ and فِطْرَتُهُ and مِلَّتُهُ. (TA.)

Perseus ID: n22134