Word by Word Analysis

فَإِذَا جَآءَتْهُمُ ٱلْحَسَنَةُ قَالُوا۟ لَنَا هَـٰذِهِۦ ۖ وَإِن تُصِبْهُمْ سَيِّئَةٌ يَطَّيَّرُوا۟ بِمُوسَىٰ وَمَن مَّعَهُۥٓ ۗ أَلَآ إِنَّمَا طَـٰٓئِرُهُمْ عِندَ ٱللَّهِ وَلَـٰكِنَّ أَكْثَرَهُمْ لَا يَعْلَمُونَ 131

But when good [i.e., provision] came to them, they said, "This is ours [by right]." And if a bad [condition] struck them, they saw an evil omen in Moses and those with him. Unquestionably, their fortune is with Allāh, but most of them do not know.