lengthen
3 occurrences across the corpus
King James Version
1 Kings 3:14
And if thou wilt walk in my ways, to keep my statutes and my commandments, as thy father David did walk, then I will lengthen thy days.
Isaiah 54:2
Enlarge the place of thy tent, and let them stretch forth the curtains of thine habitations: spare not, lengthen thy cords, and strengthen thy stakes;
OT Pseudepigrapha
The Second Book of Adam and Eve 19:7
This sign happened to Jared at the end of his four hundred and fiftieth year; as did also many other wonders, we do not record. But we record only this one for shortness sake, and in order not to lengthen our narrative.