Prayer is the pillar (backbone) of the religion, and it is the greatest of the physical pillars of Islam. Its observance is among the most splendid of religious rites. The significance of the [five] prayers is evident [in] that [no one may] leave off performing them even during battle. In this hadeeth, Jaabir ibn ‘Abdullah (may Allah be pleased with them) reports [on] some of the events [that occurred during the] Battle of the Trench - [which occurred in] the fourth or fifth year after Hijra, after the disbelievers of Quraysh and the Arabs and Jews, who allied with them, joined forces in fighting the Prophet ﷺ and his Companions in al-Madeenah. Jaabir reports that ʿUmar ibn al-Khaṭṭab(may Allah be pleased with him) came to the Prophet ﷺ after sunset on the day [they dug] the trench, cursing the disbelievers of Quraysh because they [were] the cause of preoccupying the believers with digging [instead of performing] the prayer until the time of ‘Asr elapsed. Accordingly, ʿUmar did not pray until the sun was on the verge of setting. [Furthermore, Jaabir] reported that the Prophet ﷺdid not pray ‘Asr until the sun was about to set, and that it was the motive [for] ʿUmar’s anger and reviling. When the Prophet ﷺ learned of the cause of what was troubling ʿUmar [the delay in performing the prayer], he ﷺ - [who] is the truthful and supported by the truth - swore, [stating] that he also did not pray hitherto, reassuringly and pleasantly, [in order] to [ease] ʿUmar who was troubled [over] the matter. Afterwards, he ﷺ set off to Buṭhaan - [which] is a valley by al-Madeenah to the south - where he ﷺperformed ablution and prayed ‘Asr after the sun set, [thereafter] he performed the Maghrib prayer. From the other benefits that we can conclude from this hadeeth is that Muslims should strive to make up any missed obligatory prayers. It also shows that it is permissible to invoke Allah against the oppressor, because the Prophet ﷺ did not censure against [anything] ʿUmar [said]. Finally, it shows us the keenness of the Companions (may Allah be pleased with them) to pray on time, [and that] it was of great importance to them. .