Parallel
Numbers 10:7
Swete's Septuagint · Berean Standard Bible
καὶ ὅταν συναγάγητε τὴν συναγωγήν, σαλπιεῖτε, καὶ οὐ σημασίᾳ.
To convene the assembly, you are to sound long blasts, not short ones.