יְהוָ֖ה לְהוֹשִׁיעֵ֑נִי וּנְגִנוֹתַ֧י נְנַגֵּ֛ן כָּל־יְמֵ֥י חַיֵּ֖ינוּ עַל־בֵּ֥ית יְהוָֽה׃
The LORD is ready to save me; Therefore we will sing songs to the stringed instruments All the days of our life in the house of the LORD.
Read kabbalistic (mystical) interpretation of Isaiah 38:20: and classical mystical sources.