Responsa for Menachot 62:8

מ"ד בסוף שיטה (תהלים קג, יא) כגבוה שמים על הארץ ומ"ד בתחילת שיטה כי היכי דמרחקא שמים מארץ

It has also been reported: Rabbah B'Bar Hanah said in the name of R'Johanan (others say: R'Aha B'Bar Hanah said in the name of R'Johanan) , If the mezuzah was written [in lines of unequal length consisting of] two words, three words, and one word, it is valid, provided it was not in the form of a tent, nor tail-like.<span class="x" onmousemove="('comment',' The words in the consecutive lines must not increase in a regular order, that is, like a tent, narrow above and wide below thus: ** nor decrease in a regular order, that is, tapering off like a tail thus: ** V. Sh. Mek. notes 5 and 6.');">⁸</span> R'Hisda said, The words, 'above the earth'<span class="x" onmousemove="('comment',' Deut. XI, 22; the last words in the mezuzah.');">⁹</span>

Teshuvot Maharam