Paul mentions Timothy’s great merit in order to teach them not only that he should be treated with honor in their company but that once he had made preparations to leave he should be sent on his way with deference, because he was an apostle of the Lord.
"Let no one therefore despise him." And not this only does he demand of them, but also greater honor; wherefore also he says, "but set him forward in peace;" that is, without fear; causing no fightings or contentions, no enmities or hatreds, but rendering all subjection as to a teacher.
"That he may come unto me: for I expect him with the brethren." This also was the language of one that would alarm them. That is, in order that they might become more considerate, as knowing that all would be told him whatever Timothy's treatment might be, he adds therefore, "for I expect him." And besides, hereby he both shows that Timothy is worthy of their confidence; since being on the point of departing he waits for him; and also signifies the love which he has towards them, it appearing that for their sakes he sent away one so useful to him.
[AD 384] Ambrosiaster on 1 Corinthians 16:11