At-Tawba 9:108

Never pray therein [O Prophet]. A mosque that was founded on piety[81] from the first day is more deserving for you to pray therein. In it are men who love to keep themselves pure, and Allah loves those who keep themselves pure.

[81] This is the description of the Qubā’ mosque.

Do not stand [for prayer] within it - ever. A mosque founded on righteousness from the first day[504] is more worthy for you to stand in. Within it are men who love to purify themselves; and Allāh loves those who purify themselves.

[504] This description is of the Qubā’ mosque.

108. Never stand you therein. Verily, the mosque whose foundation was laid from the first day on piety is more worthy that you stand therein (to pray). In it are men who love to clean and to purify themselves. And Allâh loves those who make themselves clean and pure [i.e. who clean their private parts with dust (which has the properties of soap) and water from urine and stools, after answering the call of nature].

Never stand (to pray) there. A place of worship which was found upon duty (to Allah) from the first day is more worthy that thou shouldst stand (to pray) therein, wherein are men who love to purify themselves. Allah loveth the purifiers.