He shall not strive, nor cry. In Isaiah the clause is, "He shall not cry aloud nor lift up his voice ( אשי אלו קעצי אל);" and so the LXX. But "strive" would represent one very frequent connotation of "cry aloud" and its synonyms, for in Eastern lands disputants use their voice much more loudly than we do.
This close connexion between the two ideas is seen also in the Syriac Version of Isaiah,. where "lift up his voice" is translated narib, a word meaning primarily "he shall strive," and only secondarily "he shall lift up his voice."
It is possible, but not probable, that Matthew's "strive" is taken directly from narib, adopting its primary and commoner meaning, and transposed. Neither shall any man hear his voice in the streets.
A slight paraphrase of the original, "nor cause his voice to he heard in the street," perhaps due to different vocalization of the Hebrew.