And [mention] when We made the House a place of return for (2:125)

﴿وَإِذْ جَعَلْنَا الْبَيْتَ مَثَابَةً لِّلنَّاسِ وَأَمْنًا وَاتَّخِذُوا مِن مَّقَامِ إِبْرَاهِيمَ مُصَلًّى ۖ وَعَهِدْنَا إِلَىٰ إِبْرَاهِيمَ وَإِسْمَاعِيلَ أَن طَهِّرَا بَيْتِيَ لِلطَّائِفِينَ وَالْعَاكِفِينَ وَالرُّكَّعِ السُّجُودِ﴾
[ البقرة: 125]

2:125 And [mention] when We made the House a place of return for the people and [a place of] security. And take, [O believers], from the standing place of Abraham a place of prayer. And We charged Abraham and Ishmael, [saying], "Purify My House for those who perform Tawaf and those who are staying [there] for worship and those who bow and prostrate [in prayer]."

The Qur’ān relates that Allah made the Kaaba a place for people to return to, as a means of connecting their hearts to Him.
When they travel from it, they return to it.
It has also been made a safe place for them where they will not be attacked.
Allah tells people to make the stone which Abraham stood on while he was building the Kaaba into a place of prayer.
Allah instructed Abraham and his son Ishmael to purify the sanctuary from filth and idols for those who wish to worship in it, go around the Kaaba, stay there for worship, praying and so on.

And (remember) when We made the House (the Ka'bah at Makkah) a place of resort for mankind and a place of safety. And take you (people) the Maqam (place) of Ibrahim (Abraham) [or the stone on which Ibrahim (Abraham) stood while he was building the Ka'bah] as a place of prayer (for some of your prayers, e.g. two Rak'at after the Tawaf of the Ka'bah at Makkah), and We commanded Ibrahim (Abraham) and Isma'il (Ishmael) that they should purify My House (the Ka'bah at Makkah) for those who are circumambulating it, or staying (I'tikaf), or bowing or prostrating themselves (there, in prayer).

phonetic Transliteration

Waith jaAAalna albayta mathabatan lilnnasi waamnan waittakhithoo min maqami ibraheema musallan waAAahidna ila ibraheema waismaAAeela an tahhira baytiya lilttaifeena waalAAakifeena waalrrukkaAAi alssujoodi

Abdullah Yusuf Ali - Translation

Remember We made the House a place of assembly for men and a place of safety; and take ye the station of Abraham as a place of prayer; and We covenanted with Abraham and Isma'il, that they should sanctify My House for those who compass it round, or use it as a retreat, or bow, or prostrate themselves (therein in prayer).

Safi-ur-Rahman al-Mubarakpuri

And (remember) when We made the House (the Ka`bah at Makkah) a place of resort for mankind and a place of safety. And take you (people) the Maqam (place) of Ibrahim as a place of prayer. And We commanded Ibrahim (Abraham) and Isma`il (Ishmael) that they should purify My House (the Ka`bah at Makkah) for those who are circumambulating it, or staying (I`tikaf), or bowing or prostrating themselves (there, in prayer).

Page 19 English transliteration