The word(s) "underneath" appears 4 time(s) in 4 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) Does any of you wish that he should have a garden with date-palms and vines and streams flowing underneath, and all kinds of fruit, while he is stricken with old age, and his children are not strong (enough to look after themselves)- that it should be caught in a whirlwind, with fire therein, and be burnt up? Thus doth Allah make clear to you (His) Signs; that ye may consider.

(2) For such the reward is forgiveness from their Lord, and Gardens with rivers flowing underneath,- an eternal dwelling: How excellent a recompense for those who work (and strive)!

(3) And for this their prayer hath Allah rewarded them with gardens, with rivers flowing underneath,- their eternal home. Such is the recompense of those who do good.

(4) And Pharaoh proclaimed among his people, saying: "O my people! Does not the dominion of Egypt belong to me, (witness) these streams flowing underneath my (palace)? What! see ye not then?