Sirach 2:3

3 Cleave unto him, and depart not away, that thou mayest be increased at thy last end.

Sirach 2:3 In-Context

1 My son, if thou come to serve the Lord, prepare thy soul for temptation.
2 Set thy heart aright, and constantly endure, and make not haste in time of trouble.
3 Cleave unto him, and depart not away, that thou mayest be increased at thy last end.
4 Whatsoever is brought upon thee take cheerfully, and be patient when thou art changed to a low estate.
5 For gold is tried in the fire, and acceptable men in the furnace of adversity.

The Brenton translation of the Septuagint is in the public domain.