Mishkat al-Masabih 3917
Anas said:
When we encamped we did not glorify God* till we had loosened the saddles. 

* This is explained as meaning to perform the salat . Cf. Mirqat , iv, 218.

Abu Dawud transmitted it.
وَعَن أنسٍ قَالَ: كُنَّا إِذَا نَزَلْنَا مَنْزِلًا لَا نُسَبِّحُ حَتَّى نحُلَّ الرِّحالَ. رَوَاهُ أَبُو دَاوُد