Adam Clarke on Isaiah 30:18

And therefore will he be exalted "Even for this shall he expect in silence" - For ירום yarum, he shall be exalted, which belongs not to this place, Houbigant reads ידום yadum, he shall be silent: and so it seems to be in a MS. Another MS. instead of it reads ישוב yashub, he shall return. The mistakes occasioned by the similitude of the letters ד daleth and ר resh are very frequent, as the reader may have already observed.