GregOr 13 11.3.9 :ܕܚ݁ܠ ܐܢܐ ܕܕܠܡܐ ܗܢܐ ܟܠܗ ܣܝܦܐ ܕܐܠܗܐ܂ ܢܫܚܬ‏ : I fear lest this whole sword of God will rust
See the entire entry for šḥt vb. to rust, be ruined