Here is another great Guy Tzvi Mintz video..
Lev tahor b'ra li Elohim, vruach nachon chadesh b'kirbi-Al tashlicheni mi'lfanecha, v'ruach kodshecha al tikach mimeni.
לֵב טָהוֹר, בְּרָא-לִי אֱלֹהִים; וְרוּחַ נָכוֹן, חַדֵּשׁ בְּקִרְבִּי.
אַל-תַּשְׁלִיכֵנִי מִלְּפָנֶיךָ; וְרוּחַ קָדְשְׁךָ, אַל-תִּקַּח מִמֶּנִּי.
Translation:
God has given me a pure heart, and His holy spirit He has placed within me, do not cast me away from before you, and do not take your holy spirit from me.