Deus judex justus fortis et paciens
Full text (standardized spelling):
Deus judex justus fortis et paciens non irans inferens per singulos dies
Concordance on E-L (León) Ms. 8 f. 300, E-To (Toledo) ms. 35.4 f. 85. As the text is almost dimmed away and the manuscript has suffered some rippings, text has been checked with León 8.