On. For. Hebrew. ki. Some codices, with Septuagint, Syriac, and Vulgate, read Veki, "and for", thus restoring the Vav (consonant), which otherwise is wanting.
Related Commentaries of Psalms 25:5
Psalms 25:5
5 Lead me in thy truth, and teach me: for thou art the God of my salvation; on thee do I wait all the day.