[God] clarified three letters from the simple ones with the secret of the three mothers—א-מ-ש—and [God] inserted them in [God's] great name, and sealed with them six directions. Five – [God] sealed Above, and turned upwards and sealed it in YH"W. Six – [God] sealed Below, and turned downwards and sealed it in YW"H. Seven – [God] sealed East, and turned forwards and sealed it in HY"W. Eight – [God] sealed West, and turned backwards and sealed it in HW"Y. Nine – [God] sealed South, and turned to the right and sealed it in WY"H. Ten – [God] sealed North, and turned to the left and sealed it in WH"Y.
Ein Sof
Sefer Yetzirah 1:13