King James Version (KJV)
Now also when I am old and greyheaded, O God, forsake me not; until I have shewed thy strength unto this generation, and thy power to every one that is to come.
Modern English
So even to old age and gray hairs, O God, do not forsake me, until I proclaim your might to another generation, your power to all those to come.
Hebrew
וְגַם עַד זִקְנָ֥ה וְשֵׂיבָ֗ה אֱלֹהִ֗ים אַל תַּעַזְבֵ֑נִי עַד אַגִּ֣יד זְרוֹעֲךָ֣ לְד֑וֹר לְכָֽל יָב֣וֹא גְּ֭בוּרָתֶ֣ךָ׃
vgam ʿad ziqnah vsheybah ʾelohiym ʾal taʿazbeniy ʿad ʾagiyd zrvoʿaka ldvor lkal yabvoʾ gbvrateka