The word(s) "footing" appears 3 time(s) in 3 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) O ye who believe! Ye are forbidden to inherit women against their will. Nor should ye treat them with harshness, that ye may Take away part of the dower ye have given them,-except where they have been guilty of open lewdness; on the contrary live with them on a footing of kindness and equity. If ye take a dislike to them it may be that ye dislike a thing, and Allah brings about through it a great deal of good.

(2) They but wish that ye should reject Faith, as they do, and thus be on the same footing (as they): But take not friends from their ranks until they flee in the way of Allah (From what is forbidden). But if they turn renegades, seize them and slay them wherever ye find them; and (in any case) take no friends or helpers from their ranks;-

(3) Moses said to him: "May I follow thee, on the footing that thou teach me something of the (Higher) Truth which thou hast been taught?"