﴿ قَالُوا۟ مَآ أَخْلَفْنَا مَوْعِدَكَ بِمَلْكِنَا وَلَٰكِنَّا حُمِّلْنَآ أَوْزَارًۭا مِّن زِينَةِ ٱلْقَوْمِ فَقَذَفْنَٰهَا فَكَذَٰلِكَ أَلْقَى ٱلسَّامِرِىُّ ﴾

“They answered: "We did not break our promise to thee of our own free will, but [this is what happened:] we were loaded with the [sinful] burdens of the [Egyptian] people's ornaments, and so we threw them [into the fire], and likewise did this Samaritan cast [his into it]."”

Please check ayah 20:89 for complete tafsir.