من لا يحضره الفقيه, volume 1, page 278

Hadith.855 – Zurarah narrated from Imam Muhammad ibn Ali Al-Baqir (as) that He said: "There is no prayer except toward the Qiblah." Zurarah asked: "And where is the boundary of the Qiblah?" Imam (as) replied: "The entire area between the east and the west is the Qiblah." Zurarah then asked: "What if someone prays facing a direction other than the Qiblah, or on a cloudy day when they miss the correct time?" Imam (as) said: "They must repeat the prayer”.

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.856 - In another narration, the Imam said : "Then turn your face toward the Qiblah and do not turn your face away from the Qiblah, lest your prayer become invalid. Allah (swt), the Mighty and Majestic, says to His Prophet in the obligatory prayer: 'Turn your face toward the Sacred Mosque (Surah Al-Baqarah 2:144); and wherever you are, turn your faces toward it.' Stand upright." The Prophet (sw) said: "Whoever does not straighten their spine (while standing) has no prayer." And lower your gaze in humility before Allah (swt), the Mighty and Majestic; do not raise it to the sky. Let your gaze be directed in front of you toward your place of prostration”.

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.